MFC r281775:
Pull in r229911 from upstream llvm trunk (by Benjamin Kramer):
MC: Allow multiple comma-separated expressions on the .uleb128 directive. For compatiblity with GNU as. Binutils documents this as '.uleb128 expressions'. Subtle, isn't it?
Reported by: sbruno
PR: 199554
MFC r281777:
Add llvm patch corresponding to r281775.