[ARM] Fix endianness of Thumb .inst.w directive

Wide Thumb2 instructions should be emitted into the object file as pairs of
16-bit words of the appropriate endianness, not one 32-bit word.

Differential revision: https://reviews.llvm.org/D41185



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321799 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed