Pass -pie to linker when generating executable on Android
This fixes problem with LTO on Android.

Differential Revision: http://reviews.llvm.org/D2668

llvm-svn: 207520
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index a8d3f01..bda4edf 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -6917,7 +6917,10 @@
     ToolChain.getTriple().getEnvironment() == llvm::Triple::Android;
   const bool IsPIE =
     !Args.hasArg(options::OPT_shared) &&
-    (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault());
+    !Args.hasArg(options::OPT_static) &&
+    (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault() ||
+     // On Android every code is PIC so every executable is PIE
+     isAndroid);
 
   ArgStringList CmdArgs;