Need Reviewers - corba cygwin build time improvements

[irisg at alum.mit.edu]

Hi, Kelly.

> 6875240: Reduce Makefile build time by limiting repeated exec's
> 
> Webrev is at:
>
http://cr.openjdk.java.net/~ohair/openjdk7/jdk7-build-cygwin-6875240/webrev/

make/common/Defs.gmk 
- line 2 - Copyright year is 1995-2007. 
- new lines 370 403 - inappropriate references to TeamWare/SCCS 

iris