Use Triple.isAndroid() where possible.

llvm-svn: 249751
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index dde68a1..66140a1 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -495,10 +495,8 @@
 
   if (AllAddedKinds & Address) {
     AsanSharedRuntime =
-        Args.hasArg(options::OPT_shared_libasan) ||
-        (TC.getTriple().getEnvironment() == llvm::Triple::Android);
-    AsanZeroBaseShadow =
-        (TC.getTriple().getEnvironment() == llvm::Triple::Android);
+        Args.hasArg(options::OPT_shared_libasan) || TC.getTriple().isAndroid();
+    AsanZeroBaseShadow = TC.getTriple().isAndroid();
     if (Arg *A =
             Args.getLastArg(options::OPT_fsanitize_address_field_padding)) {
         StringRef S = A->getValue();