MC: Fix dumping of MCFragment values

Without this cast the "char" overload of operator<< is
chosen and the values is output as an ascii rather than
an integer.

Differential Revision: https://reviews.llvm.org/D34486

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306039 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed