Enable -pie and --enable-new-dtags by default on Android.

Summary:
Also enable -no-pie on Gnu toolchain (previously available on Darwin only).

Non-PIE executables won't even start on recent Android, and DT_RPATH is ignored by the loader.

Reviewers: srhines, danalbert

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D38430

llvm-svn: 316606
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 5eeaeb3..0379896 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -622,7 +622,7 @@
   ImplicitCfiRuntime = TC.getTriple().isAndroid();
 
   if (AllAddedKinds & Address) {
-    NeedPIE |= TC.getTriple().isAndroid() || TC.getTriple().isOSFuchsia();
+    NeedPIE |= TC.getTriple().isOSFuchsia();
     if (Arg *A =
             Args.getLastArg(options::OPT_fsanitize_address_field_padding)) {
         StringRef S = A->getValue();