Implement -fgnu89-inline. Fixes PR10041.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132460 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 62e4c3f..155ecae 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -423,6 +423,8 @@
   HelpText<"Don't assume that C++'s global operator new can't alias any pointer">;
 def fgnu_keywords : Flag<"-fgnu-keywords">,
   HelpText<"Allow GNU-extension keywords regardless of language standard">;
+def fgnu89_inline : Flag<"-fgnu89-inline">,
+  HelpText<"Use the gnu89 inline semantics">;
 def fno_gnu_keywords : Flag<"-fno-gnu-keywords">,
   HelpText<"Disallow GNU-extension keywords regardless of language standard">;
 def fdollars_in_identifiers : Flag<"-fdollars-in-identifiers">,