[pkgtools/pkgrepo2deb] Update to 0.9.20130919

Changes since 0.9.20130910:
. Typo in the pkg_summary parser
. Obey the TMPDIR environment variable
. Honor +DISPLAY messages
[mk] Configure TMPDIR while building debian binary packages

Set TMPDIR to WRKDIR when invoking pkgrepo2deb, as /tmp might not be the best
place to store temporary files. First, the package may be big and /tmp not big
enough. Second, robotpkg is supposed to write files only in WKRDIR.

[and for that matter, some bulk build machines are configured to have WRKDIR
in a 'tmpfs' filesystem, so it may be more efficient to write there]
[devel/yaml-cpp] Fix typos in depend.mk
[mk/sysdep] Fix sqlite3-tcl sysdep on Gentoo

Gentoo installs the package under lib/sqlite-3.7.7.1/, so let robotpkg search
in lib/sqlite-3* in addition to the usual path (lib/sqlite3).

While here, add SYSTEM_PKG.Gentoo (although this won't be used ATM, because
mk/platform/opsys.sh is lacking proper support for this distribution).
[mk] Recognize Gentoo distributions in $OPSYS

Gentoo does not have a /etc/lsb-release file, so add a quirck in
platform/opsys.sh, testing for /etc/gentoo-release. The version reported
by this file and filled in $OS_VERSION is the version of the
sys-apps/baselayout package.
[mk/platform] Teach robotpkg about Gentoo and OpenNao
[mk/sysdep] Add some SYSTEM_PKG names for Gentoo sysdeps
[mk] Fix internal log filter in case of killed process

Make sure the variable holding the exit code of the filtered command is not
empty. This happened once when the command was killed by linux (by OOM?).
[hardware/cwiid] Add missing dependency on gtk
[graphics/rcpdf-interface] Add missing dependency on doxygen
[middleware/omniORBpy] Default to a 'robotpkg' package on Gentoo and similar

Portage does not seem to have a package for omniORBpy.
[math/jrl-mathtools] Fix configure on Gentoo

Workaround a name clash with variable PKG_CONFIG_VERSION.
See patch-ab for details and
https://github.com/jrl-umi3218/jrl-cmakemodules/issues/25
[devel/boost-libs] Fix SYSTEM_SEARCH.boost-libs on Gentoo

Boost library names may contain a version tag, e.g. libboost_regex-1.48.so

This how boost is installed Gentoo, and this commit fixes the SYSTEM_SEARCH for
all boost libraries on this platform.
[interafces/jrl-mal] Fix configure on Gentoo

Workaround a name clash with variable PKG_CONFIG_VERSION.
See patch-aa for details and
https://github.com/jrl-umi3218/jrl-cmakemodules/issues/25