Implement << operator for DexRegisterLocation::Kind.

This makes it comparable in DCHECK_EQ and similar methods.

Change-Id: I6b5b237be89325850ae6860d011fd6741189ab01
diff --git a/runtime/quick_exception_handler.cc b/runtime/quick_exception_handler.cc
index dd384c7..fe6a529 100644
--- a/runtime/quick_exception_handler.cc
+++ b/runtime/quick_exception_handler.cc
@@ -204,8 +204,7 @@
       return VRegKind::kDoubleHiVReg;
 
     default:
-      LOG(FATAL) << "Unexpected vreg location "
-                 << DexRegisterLocation::PrettyDescriptor(kind);
+      LOG(FATAL) << "Unexpected vreg location " << kind;
       UNREACHABLE();
   }
 }
@@ -450,12 +449,11 @@
         }
         default: {
           LOG(FATAL)
-              << "Unexpected location kind"
-              << DexRegisterLocation::PrettyDescriptor(
-                    vreg_map.GetLocationInternalKind(vreg,
-                                                     number_of_vregs,
-                                                     code_info,
-                                                     encoding));
+              << "Unexpected location kind "
+              << vreg_map.GetLocationInternalKind(vreg,
+                                                  number_of_vregs,
+                                                  code_info,
+                                                  encoding);
           UNREACHABLE();
         }
       }