The ptest configure/compile/install tasks mirror the base
configure/compile/install tasks, so add an explicit dirs flag to ensure they
mkdir() and chdir() the right directory.
(From OE-Core rev: 2b407176091c5a8697260c79f7559c933f38c317)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>