[Mips] Support mips-r6 path suffix for Adnroid MIPS toolchain

This path suffix is used if user provides the -mips32r6 command line
options.

llvm-svn: 230469
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index 579759e..9091c38 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -1724,6 +1724,7 @@
 
   MultilibSet AndroidMipsMultilibs = MultilibSet()
     .Maybe(Multilib("/mips-r2").flag("+march=mips32r2"))
+    .Maybe(Multilib("/mips-r6").flag("+march=mips32r6"))
     .FilterOut(NonExistent);
 
   MultilibSet DebianMipsMultilibs;
@@ -1783,6 +1784,7 @@
   addMultilibFlag(isMips16(Args), "mips16", Flags);
   addMultilibFlag(CPUName == "mips32", "march=mips32", Flags);
   addMultilibFlag(CPUName == "mips32r2", "march=mips32r2", Flags);
+  addMultilibFlag(CPUName == "mips32r6", "march=mips32r6", Flags);
   addMultilibFlag(CPUName == "mips64", "march=mips64", Flags);
   addMultilibFlag(CPUName == "mips64r2" || CPUName == "octeon",
                   "march=mips64r2", Flags);