license: fix LICENSE_CREATE_PACKAGE to stay disabled by default

license: fix LICENSE_CREATE_PACKAGE to stay disabled by default

* as reported by Enrico on #oe
  11:06:50 < ensc|w> JaMa: might this be caused by dc78ef91a2bf01efb8028c9afbe69e506e016265
  which checks for 'd.getVar('LICENSE_CREATE_PACKAGE', True)' evaluating to 'True' for every
  string (including the default 0)

(From OE-Core rev: bc42585ad9ca3a9891459ec3234893dff420b95b)

(From OE-Core rev: 0ab56ad52937823dc66b541dd4eda09fb6a34407)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>