Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir
Stefanovic. I removed the part that actually emits the instructions cause
I want that to get in better shape first and in incremental steps. This
also makes it easier to review the upcoming parts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135678 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/configure b/configure
index ad89e89..d8cc0a2 100755
--- a/configure
+++ b/configure
@@ -4865,7 +4865,7 @@
  ;;
     ARM)         TARGET_HAS_JIT=1
  ;;
-    Mips)        TARGET_HAS_JIT=0
+    Mips)        TARGET_HAS_JIT=1
  ;;
     XCore)       TARGET_HAS_JIT=0
  ;;