license.bbclass: import modified license.bbclass from oe-core to package license

* add LICENSE_CREATE_PACKAGE = 1 in conf/local.conf to package license texts in PN-lic

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
license.bbclass: update from oe-core/master and fix empty lic_files_paths for eglibc-locale and packagegroup-core-ssh-openssh

* it was returning True from find_license_files and failing to copy them
  TypeError: 'bool' object is not iterable

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
license.bbclass: use do_package_prepend only for target recipes

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qt4-webos: depend on virtual/egl when building armv6

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>