[v3] doxygen vs. pdflatex, kill COMPACT_LATEX

[Benjamin De Kosnik]

Here's a deceptively small patchlet that allows make doc-pdf-doxygen
build the api PDF file when the prerequisites are met. (And the
texmf.cnf file is edited to increase the underlying TeX
subsystem's memory.) I'm currently using doxygen 1.8.1.1 and a variety
of latex subsystems, depending on the machine I use to generate docs.
Up to this point, fedora 17 would fail to complete generation of the
pdf file.

This fixes it, allowing the generation on both f16 and f17. Hopefully
others.

tested x86/linux, f16
tested x86/linux, f17

-benjamin
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