packagegroup-cross-canadian: change package name to include MACHINE

packagegroup-cross-canadian: change package name to include MACHINE

Since meta-environment package name was changed to contain MACHINE,
change packagegroup-cross-canadian package name too, in order to be able
to select the proper environment files for a certain machine.

Also, remove the RPROVIDES since adt-installer doesn't really need it.

[YOCTO #4783]

(From OE-Core rev: d713447dc2fab8900f47c542cfbbb76bad19a7e2)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>