[Merge][CMake] r7404 from branches/cmake: Skip LATEX_USABLE guard for...

[Merge][CMake] r7404 from branches/cmake: Skip LATEX_USABLE guard for buildsystem.pdf as the check is incorporated into dune_add_latex_document.


[[Imported from SVN: r7409]]

doc/buildsystem/CMakeLists.txt

-if(LATEX_USABLE)
-  dune_add_latex_document(buildsystem.tex FATHER_TARGET doc DEFAULT_PDF INPUTS ../Makefile.am ../../configure.ac ../example.opts)
-  create_doc_install(${CMAKE_CURRENT_BINARY_DIR}/buildsystem.pdf ${CMAKE_INSTALL_DOCDIR}/buildsystem)
-endif(LATEX_USABLE)
+dune_add_latex_document(buildsystem.tex FATHER_TARGET doc DEFAULT_PDF INPUTS ../Makefile.am ../../configure.ac ../example.opts)
+create_doc_install(${CMAKE_CURRENT_BINARY_DIR}/buildsystem.pdf ${CMAKE_INSTALL_DOCDIR}/buildsystem)