clang-format: Implemented tab usage for continuation and indentation

Use tabs to fill whitespace at the start of a line.

Patch by Maxime Beaulieu

Differential Revision: http://reviews.llvm.org/D19028

llvm-svn: 266320
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index cc11d3d..66c0812 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -69,6 +69,8 @@
     IO.enumCase(Value, "Always", FormatStyle::UT_Always);
     IO.enumCase(Value, "true", FormatStyle::UT_Always);
     IO.enumCase(Value, "ForIndentation", FormatStyle::UT_ForIndentation);
+    IO.enumCase(Value, "ForContinuationAndIndentation",
+                FormatStyle::UT_ForContinuationAndIndentation);
   }
 };