Add clang -cc1 support for -remap-file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90414 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 74aa11b..991de38c 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -188,6 +188,9 @@
 def code_completion_at : Separate<"-code-completion-at">,
   MetaVarName<"file:line:column">,
   HelpText<"Dump code-completion information at a location">;
+def remap_file : Separate<"-remap-file">,
+  MetaVarName<"<from>;<to>">,
+  HelpText<"Replace the contents of the <from> file with the contents of the <to> file">;
 def code_completion_at_EQ : Joined<"-code-completion-at=">,
   Alias<code_completion_at>;
 def no_code_completion_debug_printer : Flag<"-no-code-completion-debug-printer">,