Fix Soong mips builds

Change-Id: I6ae8208e077d831969b08e7abd232deaa20ceca1
diff --git a/libc/Android.bp b/libc/Android.bp
index c7f18b9..ae883d2 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -113,12 +113,19 @@
             cflags: ["-DUSE_DLMALLOC"],
         },
     },
-    // Clang/llvm has incompatible long double (fp128) for x86_64.
-    // https://llvm.org/bugs/show_bug.cgi?id=23897
     arch: {
+        // Clang/llvm has incompatible long double (fp128) for x86_64.
+        // https://llvm.org/bugs/show_bug.cgi?id=23897
         x86_64: {
             clang: false,
         },
+        // b/25291096, Clang/llvm compiled libc.so for mips/mips64 failed to boot.
+        mips: {
+            clang: false,
+        },
+        mips64: {
+            clang: false,
+        },
     },
 
     stl: "none",