ART: Change Checker syntax for variables

This patch changes the syntax for defining and referencing variables
from square brackets '[[VAR]]' to angle brackets '<<VAR>>'. This is
done in order to avoid clashes when matching against lists enclosed
in square brackets.

Change-Id: Ib9560b07bdc7bd641fd1eb6143c0063e0783f1eb
diff --git a/test/446-checker-inliner2/src/Main.java b/test/446-checker-inliner2/src/Main.java
index ecf071e..5d4ddf8 100644
--- a/test/446-checker-inliner2/src/Main.java
+++ b/test/446-checker-inliner2/src/Main.java
@@ -17,15 +17,15 @@
 public class Main {
 
   // CHECK-START: int Main.inlineInstanceCall(Main) inliner (before)
-  // CHECK-DAG:     [[Invoke:i\d+]]  InvokeStaticOrDirect
-  // CHECK-DAG:                      Return [ [[Invoke]] ]
+  // CHECK-DAG:     <<Invoke:i\d+>>  InvokeStaticOrDirect
+  // CHECK-DAG:                      Return [ <<Invoke>> ]
 
   // CHECK-START: int Main.inlineInstanceCall(Main) inliner (after)
   // CHECK-NOT:                      InvokeStaticOrDirect
 
   // CHECK-START: int Main.inlineInstanceCall(Main) inliner (after)
-  // CHECK-DAG:     [[Field:i\d+]]   InstanceFieldGet
-  // CHECK-DAG:                      Return [ [[Field]] ]
+  // CHECK-DAG:     <<Field:i\d+>>   InstanceFieldGet
+  // CHECK-DAG:                      Return [ <<Field>> ]
 
   public static int inlineInstanceCall(Main m) {
     return m.foo();
@@ -38,15 +38,15 @@
   int field = 42;
 
   // CHECK-START: int Main.inlineNestedCall() inliner (before)
-  // CHECK-DAG:     [[Invoke:i\d+]]  InvokeStaticOrDirect
-  // CHECK-DAG:                      Return [ [[Invoke]] ]
+  // CHECK-DAG:     <<Invoke:i\d+>>  InvokeStaticOrDirect
+  // CHECK-DAG:                      Return [ <<Invoke>> ]
 
   // CHECK-START: int Main.inlineNestedCall() inliner (after)
   // CHECK-NOT:                      InvokeStaticOrDirect
 
   // CHECK-START: int Main.inlineNestedCall() inliner (after)
-  // CHECK-DAG:     [[Const38:i\d+]] IntConstant 38
-  // CHECK-DAG:                      Return [ [[Const38]] ]
+  // CHECK-DAG:     <<Const38:i\d+>> IntConstant 38
+  // CHECK-DAG:                      Return [ <<Const38>> ]
 
   public static int inlineNestedCall() {
     return nestedCall();