Fix x_offset in vertical mode

To move right in real vertical mode is actually to move upwards in
xetex, so it seems that we have to reverse the plus sign of x_offset.
In fact I know a font that has vertical gpos feature using x_offset,
and this font works correctly when the following patch has been
applied.  In the same logic, it seems that the sign of x_advance
should be reversed as well.  But I am not sure as I do not have any
font to test this.
libs/freetype2: Update another patch from git repository

configure: Use egrep, not grep.

git-svn-id: svn://tug.org/texlive/trunk/Build@29566 c570f23f-e606-0410-a88d-b1316a301751
graphite2: Upstream patch for Solaris

git-svn-id: svn://tug.org/texlive/trunk/Build@29527 c570f23f-e606-0410-a88d-b1316a301751
build system: Fixed some typos

git-svn-id: svn://tug.org/texlive/trunk/Build@29511 c570f23f-e606-0410-a88d-b1316a301751
Remove GNUMAKE variable (after freetype2 as the only library which needed it has been fixed in r29454).

git-svn-id: svn://tug.org/texlive/trunk/Build@29460 c570f23f-e606-0410-a88d-b1316a301751
clisp build process, other build docs

git-svn-id: svn://tug.org/texlive/trunk/Build@29540 c570f23f-e606-0410-a88d-b1316a301751
ICU: Avoid to run pkgdata again and again

git-svn-id: svn://tug.org/texlive/trunk/Build@29379 c570f23f-e606-0410-a88d-b1316a301751
icu 51.1 (release)

git-svn-id: svn://tug.org/texlive/trunk/Build@29456 c570f23f-e606-0410-a88d-b1316a301751
do not define _XOPEN_SOURCE_EXTENDED on Solaris

git-svn-id: svn://tug.org/texlive/trunk/Build@29627 c570f23f-e606-0410-a88d-b1316a301751