java.desktop should consider explicitly asking which std lib it wants to use by adding "-stdlib=libc++" to the linker flags (like hotspot does)

This way if we decide in the future to bump target deployment again, and the compiler decides it wants a different std lib by default for that version, we can take our time and separate changing the compiler version vs getting new stdlib, instead of scrambling like with JDK-8196724

This issue occurred on OS X, but might apply to all platforms