vala compiler --pkg includes more than necessary

[chergert]

libbaz = static_library(..
  dependencies: [dependency('baz', static: true),
]
foo = executable(..
  dependencies: [libbaz]
)

If at this point, --pkg baz will be added to things which are related to foo, even though it was static. This makes it difficult for me to use a static library via pkgconfig from Builder because eventually a valac plugin will try to compile using --pkg baz, for which no such vala package exists.

[ePirat]

Maybe related to #3939