scripts: gki: Add support for qgki-consolidate_defconfig

consolidate fragment contains the all the debug features
on top of qgki fragment for regular debugging and debug
fragment contains memory debug features. Add support for
fragement merging support in the both generate_defconfig.sh
and fragement_menuconfig.sh scripts.

Change-Id: Iea90997eca060fdf86cd9da08106e7cf11460b21
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>