bitbake: providers: Fix determinism issue

bitbake: providers: Fix determinism issue

We saw builds where runtime providers were sometimes changing order and the
build result was therefore non-deterministic. For example it could show:

DEBUG: providers for lib32-initd-functions are: ['lib32-lsbinitscripts', 'lib32-initscripts']
or
DEBUG: providers for lib32-initd-functions are: ['lib32-initscripts', 'lib32-lsbinitscripts']

which could cause a test to pass or fail.

This change ensures we don't rely on the random order of dictonaries in
memory and act deterministically.

(Bitbake rev: ebce92bf8d71f8a6e8af1c6cf6ba335faf9d67c8)

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