hg: build-infra/jdk8/hotspot: * Add support in cygwin for new uncygdrive behaviour (uncygdrive -c cmd args)

[magnus.ihse.bursie at oracle.com]

Changeset: ceed66613f38
Author:    ihse
Date:      2012-09-24 15:06 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/hotspot/rev/ceed66613f38

* Add support in cygwin for new uncygdrive behaviour (uncygdrive -c cmd args)
* Add support for msys with new uncygdrive.

! make/windows/makefiles/defs.make