[Merge][CMake] Merged revisions : 6604

Revision  r6604
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Install buildsystem.pdf

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[[Imported from SVN: r7150]]

doc/buildsystem/CMakeLists.txt

 include(UseLATEX)
 ADD_LATEX_DOCUMENT(buildsystem.tex DEFAULT_PDF INPUTS ../Makefile.am ../../configure.ac ../example.opts)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/buildsystem.pdf
+  DESTINATION share/doc/dune-common/buildsystem)