Rename ENABLE_GPLV3_GDBSERVER to ENABLE_GPLV3_DEBUG_TOOLS

ENABLE_GPLV3_DEBUG_TOOLS now enables both gdbserver and gdb build.
Also add SEPARATE_ARCHIVE_DEBUG variable to local.conf.in

Signed-off-by: Sergey Ignatov <sergey_ignatov@mentor.com>
gdbserver-gplv3.inc: check installation of gdb into rootfs.

Check for installation of gdb into a rootfs with
ALLOW_GPLV3_DEBUG_TOOLS set, the way we do for gdbserver.

Signed-off-by: Awais Belal <awais_belal@mentor.com>
Merge pull request #24 from abelal/adjust-pull6-split-debug

gdb, gdbserver: Incorporate changes for split debug.