MCCodePadder.h: Include definition of type for use with DenseMap

Pointer traits require a full definition of a type to function
correctly, so the header must be included rather than only a forward
declaration.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316714 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed