Fix floating-point string compare in CoverageTest.

Because 1.2f has no exact floating point representation, this test fails with -draftCompile and -ea.  Using 1.5f which can be represented exactly.

http://gwt-code-reviews.appspot.com/312804/show
Suggested by: spoon
Review by: tobyr


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7942 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/test/com/google/gwt/dev/jjs/test/CoverageTest.java b/user/test/com/google/gwt/dev/jjs/test/CoverageTest.java
index 8493a0d..daebfc7 100644
--- a/user/test/com/google/gwt/dev/jjs/test/CoverageTest.java
+++ b/user/test/com/google/gwt/dev/jjs/test/CoverageTest.java
@@ -193,10 +193,10 @@
       }
 
       try {
-        assert i == 3 : 1.2f;
+        assert i == 3 : 1.5f;
         fail();
       } catch (AssertionError e) {
-        assertEquals("1.2", e.getMessage());
+        assertEquals("1.5", e.getMessage());
       }
 
       try {