turbovnc: update to 1.2.1.
apr: update to 1.5.1; use native libtool.
xbps-src: change order of how subpackages are processed.

10 Non development packages are processed first lexically.
20 Development packages are processed after 10.

This resolves the issue of 32bit pkg creation with development pkgs
that depend on other non-development subpkgs, and result in wrong
dependencies being propagated to the 32bit development pkgs.
MesaLib: make sure -devel is processed the last one.

... otherwise the 32bit pkg could have incorrect dependencies.
gcc: revbump to build 32bit pkgs with proper rdeps.
Merge pull request #518 from onekk/master

Modified package brother-dcp197c-cupswrapper
Manual: document subpkg order processing.
New package: libstrophe-0.8.6.
profanity: update to 0.4.4.
base-files: add /etc/modprobe.d/blacklist.conf to conf_files
base-files: install blacklist.conf into /usr/lib/modprobe.d instead.
xbps-src: run pre-pkg hooks in the install to destdir target.

The prepare-32bit hook has been moved to the pre-pkg stage and now
those hooks are executed as part of the install phase. That means that
pre-pkg hooks are now independently run for the subpkgs and the sourcepkg
after the install-destdir phase and pre/do/install hooks.

As bonus, finally correct rdeps can now be collected for the 32bit pkgs
and works for all them, without the need to sort the order of subpkgs!
Manual: subpkg order tweaks.
Manual: tyop in previous.
libstrophe: rebuild to generate correct 32bit pkgs.
gcc: rebuild to generate correct 32bit pkgs.
python-configobj: update to 5.0.6
linux3.17: update to rc2
hooks/generate-gitrevs: fallback to the git cmd for bootstrap builds.
libmpc: remove obsolete replaces.