Fix building with system HarfBuzz

We need harfbuzz-icu, since it was split from the main harfbuzz module.
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harfbuzz 0.9.24

git-svn-id: svn://tug.org/texlive/trunk/Build@32146 c570f23f-e606-0410-a88d-b1316a301751
e-TeX: Fix hyphenation of LR and RL text and adapt e-(u)pTeX

git-svn-id: svn://tug.org/texlive/trunk/Build@32197 c570f23f-e606-0410-a88d-b1316a301751
freetype 2.5.1

git-svn-id: svn://tug.org/texlive/trunk/Build@32238 c570f23f-e606-0410-a88d-b1316a301751
poppler 0.24.4

git-svn-id: svn://tug.org/texlive/trunk/Build@32298 c570f23f-e606-0410-a88d-b1316a301751
graphite2 1.2.4

git-svn-id: svn://tug.org/texlive/trunk/Build@32299 c570f23f-e606-0410-a88d-b1316a301751
Support KANJI file name in (e)upTeX and XeTeX on Windows (from T. Tanaka)

git-svn-id: svn://tug.org/texlive/trunk/Build@32308 c570f23f-e606-0410-a88d-b1316a301751
Rwrite command line for popen. (Windows only)

git-svn-id: svn://tug.org/texlive/trunk/Build@32328 c570f23f-e606-0410-a88d-b1316a301751
harfbuzz 0.9.25

git-svn-id: svn://tug.org/texlive/trunk/Build@32329 c570f23f-e606-0410-a88d-b1316a301751
harfbuzz 0.9.25

git-svn-id: svn://tug.org/texlive/trunk/Build@32330 c570f23f-e606-0410-a88d-b1316a301751
use _wpopen instead of popen (Windows only)

git-svn-id: svn://tug.org/texlive/trunk/Build@32339 c570f23f-e606-0410-a88d-b1316a301751
set _wpopen binary mode (Windows only)

git-svn-id: svn://tug.org/texlive/trunk/Build@32340 c570f23f-e606-0410-a88d-b1316a301751
Remove unused variables

git-svn-id: svn://tug.org/texlive/trunk/Build@32347 c570f23f-e606-0410-a88d-b1316a301751
Correct return value of getdestdir(). (Windows only).

git-svn-id: svn://tug.org/texlive/trunk/Build@32360 c570f23f-e606-0410-a88d-b1316a301751
freetype 2.5.2

git-svn-id: svn://tug.org/texlive/trunk/Build@32368 c570f23f-e606-0410-a88d-b1316a301751
poppler 0.25.0

git-svn-id: svn://tug.org/texlive/trunk/Build@32399 c570f23f-e606-0410-a88d-b1316a301751
Fix build
Update to e-TeX 2.6 from 2013-11-21