common: Add new function strlist_rev.
* common/strlist.c (strlist_rev): New function. * common/t-strlist.c: New file. * common/Makefile.am (common_sources): Add strlist.c and strlist.h. (module_tests): Add t-strlist. (t_strlist_LDADD): New variable.
- Signed-off-by: Neal H. Walfield <neal@g10code.com>