oeqa/selftest/locale: Ensure tests work with ERROR_QA changes

oeqa/selftest/locale: Ensure tests work with ERROR_QA changes

The recent ERROR_QA changes adding build_deps exposed what were warnings in thi
test as it restricts the locales, then builds recipes with locale requirements
that were not met (in bash, gawk and python3).

Increase the list of generated locales to ensure this patches the recipes
being built and hence allowing the build to succeed.

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