.clang-format: allow packing of initializer lists

Change-Id: Iffe907de3a4db519b50f3855c121c8f6d26db450

.clang-format

@@ -24,7 +24,7 @@ BreakBeforeTernaryOperators: true
 BreakConstructorInitializersBeforeComma: false
 ColumnLimit:     80
 CommentPragmas:  '^ IWYU pragma:'
-ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
 ConstructorInitializerIndentWidth: 4
 ContinuationIndentWidth: 4
 Cpp11BracedListStyle: true