Allow -fsanitize-coverage with -fsanitize=dataflow

Summary: Allow -fsanitize-coverage with -fsanitize=dataflow

Test Plan: check-clang

Reviewers: pcc

Reviewed By: pcc

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D8476

llvm-svn: 232787
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 8c526ce..610d2ae 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -44,7 +44,7 @@
   NotAllowedWithTrap = Vptr,
   RequiresPIE = Memory | DataFlow,
   NeedsUnwindTables = Address | Thread | Memory | DataFlow,
-  SupportsCoverage = Address | Memory | Leak | Undefined | Integer,
+  SupportsCoverage = Address | Memory | Leak | Undefined | Integer | DataFlow,
   RecoverableByDefault = Undefined | Integer,
   Unrecoverable = Address | Unreachable | Return,
   LegacyFsanitizeRecoverMask = Undefined | Integer,