[Bug jit/64089] libgccjit.so.0.0.1 linkage failure on darwin

[howarth at bromo dot med.uc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64089

--- Comment #2 from howarth at bromo dot med.uc.edu ---
I see that the libgcc build handles this issue by passing the --version-script
linker option selectively using config/t-slibgcc-gld.