Bug 577444 - Update product version number to 4.23 across build script

Change-Id: Ic5e7b3d8992b807a290e98dbfde9a51c63b70c6d
Signed-off-by: Sravan Kumar Lakkimsetti <sravankumarl@in.ibm.com>
Reviewed-on: https://git.eclipse.org/r/c/equinox/rt.equinox.p2/+/188146
1 file changed