RFR: (JDK-8006667) Merge issue: Profile attribute need to be examined before custom attributes

[David Holmes]

Slightly unusual situation here. :) We're in the process of staging the 
Profiles changes ready for integration to the mainline repos via the 
jdk8/build forest. That will happen in a few weeks after a test cycle. 
All those changes have already gone out for review etc.

Alan just discovered that when I merged the Profiles changes to the 
LauncherHelper with the recent FXHelper changes, they ended up in the 
wrong order - Profiles needs to be checked first. So this change 
addresses that swap:

http://cr.openjdk.java.net/~dholmes/8006667/webrev/

Naturally Alan will be the official reviewer for this but there needs to 
be an email chain too.

Thanks,
David