RFR: 8034979 : (xs) Configuration help messages don't consider --no-create

[Mike Duigou]

Hello all;

This is a small cleanup patch with provides better summary help output for reconfigure and dry-run configurations.

http://cr.openjdk.java.net/~mduigou/JDK-8034979/0/webrev/

I do note that even though no configuration is created/updated in "--no-create" mode the output directory is created and a few files, though not a configuration, are written there.

Testing consisted of :

rm -rf build/
sh configure -n  # got expected "A configuration has been successfully checked but not created" notice
sh configure     # got expected "A new configuration has been successfully created in ...." notice
sh configure -n  # got expected "The existing configuration has been successfully checked in ...." notice
sh configure     # got expected "The existing configuration has been successfully updated in ...." notice and warning.

Cheers,

Mike