The pkgdata test broke due to oe-core cf0fd8b which added alternatives support
to bash, so the binary is now /bin/bash.bash.
Instead of fixing the test case for this new name, use the m4 recipe instead as
it has less build dependencies.
(From OE-Core rev: 68da6c98841f4450736ae170e443aa744c8b77eb)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>