Add support for the androideabi environment to our triple support, and
for the arm-linux-androideabi triple in particular.

Also use this to do a better job of selecting soft FP settings.

Patch by Evgeniy Stepanov.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147872 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 3034ede..3dcdf13 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1164,7 +1164,10 @@
     SmallVectorImpl<StringRef> &Triples) {
   if (HostArch == llvm::Triple::arm || HostArch == llvm::Triple::thumb) {
     static const char *const ARMLibDirs[] = { "/lib" };
-    static const char *const ARMTriples[] = { "arm-linux-gnueabi" };
+    static const char *const ARMTriples[] = {
+      "arm-linux-gnueabi",
+      "arm-linux-androideabi"
+    };
     LibDirs.append(ARMLibDirs, ARMLibDirs + llvm::array_lengthof(ARMLibDirs));
     Triples.append(ARMTriples, ARMTriples + llvm::array_lengthof(ARMTriples));
   } else if (HostArch == llvm::Triple::x86_64) {