clang-format: Fix Allman brace breaking of enums.

Before:
  enum Side
  { LEFT,
    RIGHT };

After:
  enum Side
  {
    LEFT,
    RIGHT
  };

This fixes llvm.org/PR19911.

llvm-svn: 210011
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 9a91b9e..19abd37 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -7679,6 +7679,11 @@
                "  Y = 0,\n"
                "}\n",
                BreakBeforeBrace);
+  verifyFormat("enum X\n"
+               "{\n"
+               "  Y = 0\n"
+               "}\n",
+               BreakBeforeBrace);
 
   verifyFormat("@interface BSApplicationController ()\n"
                "{\n"