[vcpkg_apply_patches] Work around /etc/gitconfig: Permission denied #14848
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The current CI system on linux and osx is experiencing issues due to some problems with
/etc/gitconfig
. This PR works around the issue entirely by instructing git to not read the system config file at all when applying patches.The environment variable
GIT_CONFIG_NOSYSTEM
is documented here.An example PR that hit this issue is #14825.
@strega-nil @JackBoosY