Add it to the existing list to fix it up.
Found by mold:
toolchain-x86_64_gcc-12.2.0_glibc/lib/libm.so:4: GROUP ( /lib/libm.so.6 AS_NEEDED ( /lib/libmvec.so.1 ) )
^ library not found: /lib/libm.so.6
Signed-off-by: Andre Heider <a.heider@gmail.com>