tests/extra/tc_ufcs_all_kinds: enforce a consistent locale

gdc can output error messages in the system language which can break
the regex mactches the code relies on.

Signed-off-by: Andrei Horodniceanu <[email protected]>

Author: the-horo

tests/extra/tc_ufcs_all_kinds/run.sh

@@ -19,4 +19,6 @@ else
 fi
 
 export DC ERROR_STYLE
+# gdc uses language specific error message
+export LC_ALL=${LC_ALL:-"C.UTF-8"}
 ${DC} -run generate_tests.d "${1}"