sparklemotion/nokogiri — pull request #1125 by nurse (2014-07-08 06:53:39+00:00)
Title: link libxml2 with liblzma if it is found

If the system have liblzma (and lzma.h), libxml2 enables xz/lzma helper.
It compiles xzlib.c which depends liblzma.
Therefore extconf.rb must run find_library("lzma") and link libxml2
with liblzma.