kbd: fix ptest can NOT run issue

kbd: fix ptest can NOT run issue

After kbd updated to 2.2.0, it fails to run ptest:

| make: *** No rule to make target 'libkbdfile-test01.c', needed by 'libkbdfile-test01'.

Update sed expression to fix such kind of issues. And also make target
dumpkeys-bkeymap and dumpkeys-bkeymap which are required by ptest.

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>