Remove stray emacs mode marker.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120554 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Driver/HostInfo.cpp

@@ -1,4 +1,4 @@
-//===--- HostInfo.cpp - Host specific information -----------------------*-===//
+//===--- HostInfo.cpp - Host specific information -------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //