Fix configure problem with gettext on CentOS/RHEL7
Fix configure problem with gettext on CentOS/RHEL7

Unfortunately CentOS7, RHEL7 ships 0.18.2.1, so for best compat.
level at this point in time we set 0.18.2.

Signed-off-by: Joachim Nilsson <583c295fd7602c168ad814279bbc3894ba65f5d6@gmail.com>

troglobit/libconfuse,westermo/libconfuse,westermo/libconfuse,martinh/libconfuse,peda-r/libconfuse,martinh/libconfuse,troglobit/libconfuse,peda-r/libconfuse