Otherwise we error out at link stage as follows:

/usr/lib/llvm-3.9/lib/libLLVMAMDGPUCodeGen.a(R600OptimizeVectorRegisters.cpp.o):
unrecognized relocation (0x2a) in section
`.text._ZNK12_GLOBAL__N_119R600VectorRegMerger16getAnalysisUsageERN4llvm13AnalysisUsageE'
/usr/bin/ld: final link failed: Bad value

Cc: mesa-stable@lists.freedesktop.org
Cc: Jan Vesely <jan.vesely@rutgers.edu
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>