[build] Update CircleCI jobs to Xcode 10.0

[friedbunny]

• Updates the remaining iOS/macOS/node jobs on CircleCI to use Xcode 10, replacing the test job from [build, ios] Add canary Xcode 10 CircleCI job #12911. Release builds had been using Xcode 10 since [ios, build] Build releases with Xcode 10.0 #12969.
• Bumps integration tests timeouts to 10 seconds, following in the grand tradition of [ios] Bump more test timeouts for Xcode 10 sluggishness #12978 and [tests, darwin] Standardize on 10 second timeout for map loading #13127. This will hopefully (but probably not) fix Build ios-integration-test flaky for ios-debug-xcode10 #13061.

/cc @mapbox/maps-ios

[friedbunny]

Tests are exceeding even the 10 second timeout on CI:

https://circleci.com/gh/mapbox/mapbox-gl-native/183935

MBCameraTransitionTests
  testFlyToCameraInDelegateMethod, Asynchronous wait failed: Exceeded timeout of 10 seconds, with unfulfilled expectations: "Map view should finish loading style.”.

https://circleci.com/gh/mapbox/mapbox-gl-native/184371

MBGLIntegrationTests
  testOpenGLLayerDoesNotLeakWhenMapViewDeallocs, Asynchronous wait failed: Exceeded timeout of 10 seconds, with unfulfilled expectations: "Map view should be rendered".
  /Users/distiller/project/platform/ios/Integration Tests/MGLMapViewIntegrationTest.m:143

    [super waitForExpectations:expectations timeout:seconds];
    [timer invalidate];

[friedbunny]

@julianrex do you see any alternative to indefinitely bumping timeouts? Flappy tests are (to my mind) worse than no tests, so I’d vote for disabling timing-dependent tests entirely on CI if we can’t resolve this issue.

[julianrex]

Agreed - let's disable until we can come up with a longer term solution, that doesn't require us to constantly tweak fragile settings!

[friedbunny]

Per chat with @julianrex we’re going to stop running the Integration Tests target on CircleCI for now.

[friedbunny]

Rebased and ready for review.

[friedbunny]

Some persistent, strange, and seemingly unrelated failures with two of the gcc jobs (node-gcc6-debug, linux-gcc5-debug-coverage) after rebasing onto master at 3b9618e:

[116/379] Building CXX object CMakeFiles/mbgl-core.dir/src/mbgl/renderer/layers/render_symbol_layer.cpp.o
FAILED: CMakeFiles/mbgl-core.dir/src/mbgl/renderer/layers/render_symbol_layer.cpp.o 
/src/build/linux-x86_64/Debug/launch-cxx /usr/lib/ccache/g++-6   -DMBGL_USE_GLES2=1 -DMBGL_WITH_EGL=1 -DRAPIDJSON_HAS_STDSTRING=1 -D_GLIBCXX_USE_CXX11_ABI=1 -I../../../include -I../../../src -I../../../mason_packages/linux-x86_64/swiftshader/2018-05-31/include -I../../../platform/default -I../../../platform/linux -I../../../mason_packages/linux-x86_64/libpng/1.6.25/include/libpng16 -I../../../mason_packages/linux-x86_64/libjpeg-turbo/1.5.0/include -isystem ../../../vendor/earcut.hpp/include -isystem ../../../vendor/expected/include -isystem ../../../vendor/geojson-vt-cpp/include -isystem ../../../vendor/kdbush.hpp/include -isystem ../../../vendor/shelf-pack-cpp/include -isystem ../../../vendor/supercluster.hpp/include -isystem ../../../vendor/unique_resource -isystem ../../../vendor/wagyu/include -isystem ../../../vendor/boost/include -isystem ../../../vendor/geojson.hpp/include -isystem ../../../vendor/geometry.hpp/include -isystem ../../../vendor/icu/include -isystem ../../../vendor/polylabel/include -isystem ../../../vendor/protozero/include -isystem ../../../vendor/rapidjson/include -isystem ../../../vendor/variant/include -isystem ../../../vendor/vector-tile/include -isystem ../../../vendor/nunicode/include -Werror -ftemplate-depth=1024 -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wno-variadic-macros -Wno-unknown-pragmas -fext-numeric-literals -g -fPIC -fvisibility=hidden -fvisibility-inlines-hidden   -DCI_BUILD=1 -std=c++14 -MMD -MT CMakeFiles/mbgl-core.dir/src/mbgl/renderer/layers/render_symbol_layer.cpp.o -MF CMakeFiles/mbgl-core.dir/src/mbgl/renderer/layers/render_symbol_layer.cpp.o.d -o CMakeFiles/mbgl-core.dir/src/mbgl/renderer/layers/render_symbol_layer.cpp.o -c ../../../src/mbgl/renderer/layers/render_symbol_layer.cpp
g++-6: internal compiler error: Killed (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
[117/379] Building CXX object CMakeFiles/mbgl-core.dir/src/mbgl/renderer/sources/render_geojson_source.cpp.o
[118/379] Building CXX object CMakeFiles/mbgl-core.dir/src/mbgl/renderer/layers/render_line_layer.cpp.o
[119/379] Building CXX object CMakeFiles/mbgl-core.dir/src/mbgl/renderer/sources/render_image_source.cpp.o
ninja: build stopped: subcommand failed.
Makefile:367: recipe for target 'node-all' failed
make: *** [node-all] Error 1
Exited with code 2

/cc @tmpsantos

[julianrex]

Changes here look good (no idea what's happening with the build failures though)