Merge pull request #293 from Gottox/master

chromium-pepper-flash: fix warning of obsolete flash version
gtksourceview: added gir build option.
rest: added gir build option; cross build support.
json-glib: added gir build option; cross build support.
libcanberra: cross build support.
libgee: added gir build option; cross build support.
w3m: set --libexecdir=/usr/lib to support ranger (close #286).
w3m: force linkage to libX11 to unbreak build.
firefox: depend on alsa-plugins-pulseaudio to make html5 sound work (close #291).
base-system: allow any cron-daemon vpkg (close #284).
New package: unp-2.0~pre7+nmu1 (close #218).
unp: distfiles typo.
profanity: revbump to kick in autobuilds.
tre: revbump to kick in autobuilds.
xbacklight: remove long_desc.
xauth: remove long_desc.
xar: remove long_desc.
xarchiver: remove long_desc.
xapian-core: remove long_desc.
x11perf: remove long_desc.