Many new users add "python3" to their image using IMAGE_INSTALL and are then
surprised that they can't import any of the standard library. This is because we
split up the standard library into a number of packages, and python3-core (the
interpreter and essential modules only) RPROVIDES 'python3'.
Solve this by moving the RPROVIDES of 'python3' to python3-modules, so that the
entire Python standard library is installed.
[ YOCTO #11182 ]
Signed-off-by: Ross Burton <ross.burton@intel.com>
