rpm: Use gcc on arches where llvm omp is not available
rpm: Use gcc on arches where llvm omp is not available

rpm needs omp, therefore it wont compile with clang on architectures not
supporting llvm libomp e.g. rv32

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/meta-clang,kraj/meta-clang,kraj/meta-clang