Fixes for xcode 11
commit d0a52a55
meson: fix detection of xcode 11 clang on osx/ios
commit a2009e62
cairo: don't fail configure linker tests when stderr is output
macos' linker will output version mismatch warnings to stderr and fail
the check:
ld: warning: passed two min versions (10.0.0, 10.0) for platform iOS. Using 10.0.