Adding test for the String.valueOf(F) function

Add and enable a test for a float to string conversion.

Author: romainbrenguier

regression/strings-smoke-tests/java_value_of_float/test.class

@@ -0,0 +1,8 @@
+CORE
+test.class
+--refine-strings --function test.check
+^EXIT=10$
+^SIGNAL=0$
+assertion.* file test.java line 7 .* SUCCESS$
+assertion.* file test.java line 9 .* FAILURE$
+--

regression/strings-smoke-tests/java_value_of_float/test.desc

@@ -0,0 +1,11 @@
+public class test
+{
+    public static void check(int i)
+    {
+        String s = String.valueOf(123.456f);
+        if(i == 1)
+            assert(s.equals("123.456"));
+        else
+            assert(!s.equals("123.456"));
+    }
+}