ART: Distinguish Checker lines from comments

In order to prevent tests passing due to lines with hard-to-spot
formatting errors begin ignored, e.g. by forgetting the colon after
"//CHECK", Checker will now require its assertions to start with "///"
or "##", respectivelly for Java and Smali. Such lines will never be
ignored and will fail the test unless successfully parsed.

Change-Id: I0da9a8f13eb96d950af8c85df17d1899a853a299
diff --git a/test/478-checker-inliner-nested-loop/src/Main.java b/test/478-checker-inliner-nested-loop/src/Main.java
index df583d9..aa02349 100644
--- a/test/478-checker-inliner-nested-loop/src/Main.java
+++ b/test/478-checker-inliner-nested-loop/src/Main.java
@@ -33,12 +33,12 @@
     return result;
   }
 
-  // CHECK-START: int Main.NestedLoop(int, int) inliner (before)
-  // CHECK-NOT:     Mul
+  /// CHECK-START: int Main.NestedLoop(int, int) inliner (before)
+  /// CHECK-NOT:     Mul
 
-  // CHECK-START: int Main.NestedLoop(int, int) inliner (after)
-  // CHECK:         Mul
-  // CHECK-NOT:     Mul
+  /// CHECK-START: int Main.NestedLoop(int, int) inliner (after)
+  /// CHECK:         Mul
+  /// CHECK-NOT:     Mul
 
   public static int NestedLoop(int max_x, int max_y) {
     int total = 0;