We now have a single libexpat instead of libascii_expat_xmlparse and
libexpat_xmltok. Hmm, no idea when that changed, but OK, that just simplifies
the fontconfig patch. (Note that the bundled fontconfig is used only for
Android.)

Change-Id: I3973d35a566bd3c86b013c96b7f3a6a8e249c2c0