Bug 467991 - Enable GTK3 mode for eclipse on ppc64le platform

- Modified GTK2 version check to match the ppc64le build platform(only
on ppc64le)
- Removed the code to force GTK2 execution eventhough GTK3 is available
- Modified the code for the case where SWT_GTK3 flag is defined and no
compatible gtk3 is available
- Updated the patch based on review comments

Change-Id: If66755fa938e3b57a464fa457756f97b1400a9ba
Signed-off-by: Sravan Kumar Lakkimsetti <sravankumarl@in.ibm.com>
2 files changed