Allow BackpatchWord to be called for non-32-bit aligned words, and
from outside the BitstreamWriter.

Split out of patch D12536 (Function bitcode index in Value Symbol Table
and lazy reading support), which will use it to patch in the VST offset.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247847 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed