Revert "Strip debug info when inlining into a nodebug function."

This reverts commit r296488.

As noted by David Blaikie on llvm-commits, I overlooked the case of a
debug function being inlined into a nodebug function being inlined
into a debug function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297163 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed