[mips] Do not add arch name in the compiler-rt's components.

Instead, use the constant "mips" since the libraries are already
placed under the multilib's OS suffix.

llvm-svn: 253214
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index 0380e41..d1ce3f4 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -2517,8 +2517,7 @@
   llvm::sys::path::append(Path, SelectedMultilib.osSuffix(), "lib" + LibSuffix,
                           getOS());
   llvm::sys::path::append(Path, Twine("libclang_rt." + Component + "-" +
-                                      getTriple().getArchName() +
-                                      (Shared ? ".so" : ".a")));
+                                      "mips" + (Shared ? ".so" : ".a")));
   return Path.str();
 }