Issue #20079: Added locales supported in glibc 2.18 to locale alias table.

The makelocalealias.py script now can parse the SUPPORTED file
from glibc sources and supports command line options for source paths.
Issue #20079: Added locales supported in glibc 2.18 to locale alias table.
Null merge
Issue #20076: Added non derived UTF-8 aliases to locale aliases table.
Issue #20076: Added non derived UTF-8 aliases to locale aliases table.

The makelocalealias.py script no longer ignores UTF-8 mapping.