Disable test/DebugInfo/X86/accel-tables.ll
Disable test/DebugInfo/X86/accel-tables.ll

It's failing on Darwin/x86_64, is xfailed internally, but passing on
Linux.

rdar://43568594

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm