uhu: Bump to ef8d9f8 revision
uhu: Bump to ef8d9f8 revision

This includes following changes:

2e1fa59 ui: added documentation for callback methods
1307c2b cli: added show_cursor cleanup function when push fails
c0ff891 storages: fixed callback calling ordering in ObjectReader
0c3f866 tests: increased coverage for uhu.repl.validators
80c11e9 docs: added documentation regarding API server address
1d18740 cli: created cli command for core.utils.dump_package_archive
f154f6e core: added dump_package_archive utility
8cc36b6 tests: increased coverage for uhu.core.object
33489e1 tests: simplified uhu.core.package tests
6dfc5e3 core: improved install-if-different parser
60603eb core: added __eq__ method to ObjectsManager
8628cf5 core: added __eq__ to SupportedHardwareManager
a8f580c core: removed Package file operations
d1a0017 core: improved constructors
ed44ea8 tests: removed unnecessary tests
bf4f940 core: removed unnecessary space from imports
baf3537 core: renamed _base to _object
8ca9f53 Package: moved get_status to a class method
10139f6 Object: removed mode arg from Object.__init__
a7f97b0 core: refactored all from_file and from_metadata constructors
6819146 core: refactored managers serialization method names
acfc23e objects: renamed InstallationSetManager to ObjectsManager
b352a66 README: updated supported hardware related documentation
7de4cee dot-uhu: added a new line character at the end of file when dumping

Signed-off-by: Otavio Salvador <1d31b11c1b92bf5d043d36edfe7174db39a6b891@ossystems.com.br>

fbertux/meta-updatehub,fbertux/meta-updatehub,fbertux/meta-updatehub,UpdateHub/meta-updatehub,UpdateHub/meta-updatehub,UpdateHub/meta-updatehub