Author: Andrew Nicols
MDL-61566 theme: Add Privacy providers for all core themes
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6f8ea0e2eac8e0a418ad4ba8da11e6b0f6be88a1
http://github.com/moodle/moodle/commit/6f8ea0e2eac8e0a418ad4ba8da11e6b0f6be88a1
+ 3.4 en [privacy:metadata,theme_boost]
+ 3.4 en [privacy:metadata,theme_bootstrapbase]
+ 3.4 en [privacy:metadata,theme_clean]
+ 3.4 en [privacy:metadata,theme_more]