[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: https://llvm.org/svn/llvm-project/llvm/trunk@271574 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed