clang-format: Change Google style wrt. the formatting of empty messages.

Before:
  message Empty {
  }

After:
  message Empty {}

llvm-svn: 339803
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index 9a2da69..4a67cde 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -819,7 +819,7 @@
     GoogleStyle.JavaScriptQuotes = FormatStyle::JSQS_Single;
     GoogleStyle.JavaScriptWrapImports = false;
   } else if (Language == FormatStyle::LK_Proto) {
-    GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_None;
+    GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Empty;
     GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
     GoogleStyle.SpacesInContainerLiterals = false;
     GoogleStyle.Cpp11BracedListStyle = false;