[PDB] It is not an error getting the "Invalid" Annotation opcode.

The linker can insert invalid opcodes to indicate padding
bytes, and we should not fail in this case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298016 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed