lib/oe/package_manager.py: Fix _pkg_translate_smart_to_oe function

lib/oe/package_manager.py: Fix _pkg_translate_smart_to_oe function

File: '/home/mhatle/git/oss/oe-core/meta/lib/oe/package_manager.py', lineno: 278, function: _pkg_translate_smart_to_oe
     0274:
     0275:            if found == 1 and fixed_arch == fixed_cmp_arch:
     0276:                break
     0277:        #bb.note('%s, %s -> %s, %s' % (pkg, arch, new_pkg, new_arch))
 *** 0278:        return new_pkg, new_arch
     0279:
     0280:    def _list_pkg_deps(self):
     0281:        cmd = [bb.utils.which(os.getenv('PATH'), "rpmresolve"),
     0282:               "-t", self.image_rpmlib]
Exception: UnboundLocalError: local variable 'new_arch' referenced before assignment

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>