[OpenMP] Fix __kmp_unnamed_critical_addr .type setting (#138815)
PR #138517 broke the Android LLVM builders: ARM doesn't understand the
`@object` form. As it turns out, one can use `%object` instead, which
does assemble on all targets currently supported by `z_Linux_asm.S`.
Tested by rebuilding `libomp.so` on `sparcv9-sun-solaris2.11`.