Langtools resources

[Jonathan Gibbons]

Build-infra folk,

We have recently added a new file to javadoc, but the new file is 
"ignored" in builds with the new makefiles, resulting in a broken javadoc.

We will need to add .js to the following list.

langtools/makefiles/BuildLangtools.gmk: RESOURCE_SUFFIXES:=.gif .xml 
.css javax.tools.JavaCompilerTool

We'd like to make the change and push it up through TL, with your 
approval.  Will that be OK?  If so, I'll create and post a webrev.

-- Jon