package/uacme: new package

Signed-off-by: Nicola Di Lieto <nicola.dilieto@gmail.com>
[Thomas:
 - bump to version 1.0.19
 - drop --disable-maintainer-mode and --disable-debug
 - add missing dependency on libcurl
 - drop = in --with-gnutls=]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>