oeqa/selftest/sstatetests: split 32/64 build host from no-op action tests
As more variables were being added it made sense to split this test into two:
one quick test that verifies that the host being 32-bit or 64-bit doesn't impact
the hashes, and another which compares stamps for two builds with several
variables changed and classes inherited.
Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
