Fix MIPS invoke stub.

Floating point result pointer could be unaligned, causing a segfault
if stored as a double.

Change-Id: I6ed2e2e9ca339d948f81fac82c7fe63c86d5d8b9
diff --git a/src/oat/runtime/mips/runtime_support_mips.S b/src/oat/runtime/mips/runtime_support_mips.S
index cc41d14..480e5c8 100644
--- a/src/oat/runtime/mips/runtime_support_mips.S
+++ b/src/oat/runtime/mips/runtime_support_mips.S
@@ -479,8 +479,9 @@
     sw    $v0, 0($t0)           # store the result
     sw    $v1, 4($t0)           # store the other half of the result
     lw    $t0, 20($sp)          # get floating point result pointer
+    s.s   $f0, 0($t0)           # store floating point result
     jr    $ra
-    s.d   $f0, 0($t0)           # store floating point result
+    s.s   $f1, 4($t0)           # store other half of floating point result
 END art_quick_invoke_stub
 
     /*