gettext

2cccb4c6 - m4: use AC_PROG_MKDIR_P, not the deprecated AM_PROG_MKDIR_P

m4: use AC_PROG_MKDIR_P, not the deprecated AM_PROG_MKDIR_P AM_PROG_MKDIR_P is be deprecated since Automake 1.12.1, and will be removed in Automake 1.14. Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>