[scudo] Add -fsanitize=scudo option to Fuchsia

Apparently the -fsanitize flag hadn't been added for Scudo upstream yet.

Patch By: flowerhack

Reviewers: cryptoad, alekseyshl, mcgrathr, phosek

Reviewed By: mcgrathr, phosek

Differential Revision: https://reviews.llvm.org/D41413

llvm-svn: 321314
diff --git a/clang/lib/Driver/ToolChains/Fuchsia.cpp b/clang/lib/Driver/ToolChains/Fuchsia.cpp
index 10ee7b7..269d34d 100644
--- a/clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ b/clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -280,5 +280,6 @@
   SanitizerMask Res = ToolChain::getSupportedSanitizers();
   Res |= SanitizerKind::SafeStack;
   Res |= SanitizerKind::Address;
+  Res |= SanitizerKind::Scudo;
   return Res;
 }