parse_py: add ~ to config_regexp

- enable the '~' character in bitbake variables

Signed-off-by: Constantin Musca <constantinx.musca@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
persist_data: add get_by_pattern method to API

- one can use get_by_pattern to get a list of values associated
with keys that match the specified pattern

Signed-off-by: Constantin Musca <constantinx.musca@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
hob: combo box updated correctly

The 'select a base image' option is no longer displayed once
an image is selected

[YOCTO #3671]
Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
crumbs: Add file lost from previous commit

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>