* config/locale/generic/c_locale.cc (locale::facet::_S_create_c_locale):
Throw runtime exception when unsupported language is specified.
* testsuite/testsuite_hooks.h
* config/locale/generic/c_locale.cc (locale::facet::_S_create_c_locale):
Throw runtime exception when unsupported language is specified.
* testsuite/testsuite_hooks.h