Make SDK builder download latest SDK toolchain.

BUG=none
R=sbc@chromium.org

Review URL: https://codereview.chromium.org/11946059

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@669 7dad1e8b-422e-d2af-fbf5-8013b78bd812
Fix ignoring of errors in naclports buildbot scripts.

The errexit state in the shell was mistaken left unset
after downloading tarballs.

Also, check for existence of patch program.

BUG=

Review URL: https://codereview.chromium.org/11980005

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@670 7dad1e8b-422e-d2af-fbf5-8013b78bd812
Update gitignore, remove debugging, move stray file under libraries.

Some stray debugging was added to buildbot_selector.sh by
mistake.

Move old (and most likely unused) ld helper script from
libraries to build_tools.

BUG=None

Review URL: https://codereview.chromium.org/11886103

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@671 7dad1e8b-422e-d2af-fbf5-8013b78bd812
Make nacl-linux-sdk-bundle.sh independant of CWD.

This allows us to run it from the top level of naclports, for
example.

BUG=

Review URL: https://codereview.chromium.org/12019002

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@672 7dad1e8b-422e-d2af-fbf5-8013b78bd812
Add NACLPORTS_NO_ANNOTATE, for use in SDK buildbot.

Does what is says on the box.

BUG=None

Review URL: https://codereview.chromium.org/12025002

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@673 7dad1e8b-422e-d2af-fbf5-8013b78bd812
Don't use BUILDBOT_BUILDERNAME to determine OS.

Using BUILDBOT_BUILDERNAME is bad idea, but it also
forces us to define this variable in local testing.

BUG=None

Review URL: https://codereview.chromium.org/11929010

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@674 7dad1e8b-422e-d2af-fbf5-8013b78bd812
Fix pnacl bots by adding missing include dir.

BUG=

Review URL: https://codereview.chromium.org/11871006

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@675 7dad1e8b-422e-d2af-fbf5-8013b78bd812
Fix dosbox build under pnacl

BUG=None
TEST=make dosbox

Review URL: https://codereview.chromium.org/12022023

git-svn-id: http://naclports.googlecode.com/svn/trunk/src@676 7dad1e8b-422e-d2af-fbf5-8013b78bd812