8008547: javac, warning message: use of ''_'' as an identifier might not be...

8008547: javac, warning message: use of ''_'' as an identifier might not be supported in future releases, should be more especific
Reviewed-by: jjg

src/share/classes/com/sun/tools/javac/resources/compiler.properties

@@ -2204,7 +2204,7 @@ compiler.warn.assert.as.identifier=\
 
 compiler.warn.underscore.as.identifier=\
     ''_'' used as an identifier\n\
-    (use of ''_'' as an identifier might not be supported in future releases)
+    (use of ''_'' as an identifier might not be supported in releases after Java SE 8)
 
 compiler.err.enum.as.identifier=\
     as of release 5, ''enum'' is a keyword, and may not be used as an identifier\n\