implemented --with-<lib> options (yes, no, sys, and builtin) for libjpeg,
libtiff, libpng, freetype, regex and zlib default is sys which falls back to builtin if the system library is not found git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12155 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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