Fixes "CSU tests build fails with '/usr/lib/libgcc_s.so: undefined reference to fma" when'
compiling lib/csu/tests/dynamicwhen built with LLVM 14 on powerpcspe target.e, The errorso '-lm' is being added explicitly.
is not seen on other platforms.It may be linked to https://reviews.llvm.org/D77558
MFC after: 2 days
Sponsored by: Instituto de Pesquisas Eldorado (eldorado.org.br)