meta-app-framework: add do_configure task in aglwgt.bbclass

meta-app-framework: add do_configure task in aglwgt.bbclass

Add a placeholder stub do_configure to aglwgt.bbclass instead of
marking it as noexec to make things like externalsrc that bbappend or
add prefunc's to do_configure work.  For externalsrc specifically,
this fixes the creation of the convenience oe-logs and oe-workdir
symlinks.

Bug-AGL: SPEC-3300

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Ice6bc23c21f2206963b258c57dac5045721fcfe5
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/24889
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>