Fix PR3988: extern inline functions get strong symbol definitions in
C99 mode.  This is a regression from an earlier patch of mine.

This also simplifies the linkage enums a bit.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69069 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index 06118ac..ff6c405 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -315,10 +315,9 @@
   enum GVALinkage {
     GVA_Internal,
     GVA_ExternInline,
-    GVA_GNUCInline,
     GVA_C99Inline,
     GVA_CXXInline,
-    GVA_Normal
+    GVA_StrongExternal
   };
   
 private: