devel/intel-graphics-compiler: mark BROKEN on i386 after 7f4f8e29bb31

1. ../.build/IGC/Release/bif/embedder/OCLBiFImpl__igc_bif_BC_122.cpp:1604886:1: current parser token 'unsigned'
2. ../.build/IGC/Release/bif/embedder/OCLBiFImpl__igc_bif_BC_122.cpp:3:54: LLVM IR generation of declaration '_igc_bif_BC_122'
3. ../.build/IGC/Release/bif/embedder/OCLBiFImpl__igc_bif_BC_122.cpp:3:54: Generating code for declaration '_igc_bif_BC_122'

Reported by: pkg-fallout