[ms-inline-asm] Handle dependent identifiers in inline asm

Build up a dependent expression for MS-style inline assembly if the
identifier's type is dependent.

This fixes PR26001.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@256795 91177308-0d34-0410-b5e6-96231b3b80d8