[ASMParser] Parse FP constants in non-C locales
[ASMParser] Parse FP constants in non-C locales

This patch fixes PR25788, which allows for the parsing of
floating-point constants in non-C locales.

Patch by Antoine Pitrou!

Differential Revision: http://reviews.llvm.org/D15375

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@271574 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,GPUOpen-Drivers/llvm