RFR: 7175331 - Remove FDS files from embedded JRE images

[David Holmes]

This is a simple fix that only applies to 7u and is targeted for 7u6.

We need to update the embedded image target in Release-embedded.gmk to 
remove the FDS related files that now get created. This obviously only 
impacts embedded builds.

http://cr.openjdk.java.net/~dholmes/7175331/webrev/

Also tidied up some extraneous -f options on rm ($(RM) == rm -f)

Thanks,
David