include-fixer: Don't overwrite buffer changes
include-fixer: Don't overwrite buffer changes

Raise a signal if the buffer has been modified before replacing it, to
avoid overwriting users' changes.

Patch by Philipp Stephani.

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@285060 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra