Adding support for graphviz, and Qt5 (AtlasLCG-00-00-57)

	* Updated the package to find Graphviz's dot executable using
	  FindDoxygen.cmake, and also set up a dependency on the graphviz RPM.
	* Took the opportunity to also add LCG's Qt5 to CMAKE_PREFIX_PATH.
	  But a bit more will be needed before we could use Qt5 in a
	  relocatable manner from LCG.
	* Tagging as AtlasLCG-00-00-57


Former-commit-id: 687baf2f27c64633ae76f2c1efd8b05fac6480e7

Build/AtlasLCG/LCGConfig.cmake

 # Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
 
-# $Id: LCGConfig.cmake 746545 2016-05-12 11:40:48Z krasznaa $
+# $Id: LCGConfig.cmake 751138 2016-05-31 13:50:48Z krasznaa $
 #
 # File implementing the code that gets called when a project imports
 # LCG using something like:
@@ -381,6 +381,8 @@ set( PYTHON_LIBRARY ${PYTHON_LIBRARY}
 list( APPEND CMAKE_PREFIX_PATH ${DOXYGEN_ROOT} )
 set( GSL_ROOT_DIR ${GSL_ROOT} )
 list( APPEND CMAKE_PREFIX_PATH ${QT_ROOT} )
+list( APPEND CMAKE_PREFIX_PATH ${QT5_ROOT} )
+list( APPEND CMAKE_PREFIX_PATH ${GRAPHVIZ_ROOT} )
 list( APPEND CMAKE_PREFIX_PATH ${COIN3D_ROOT} )
 list( APPEND CMAKE_PREFIX_PATH ${EXPAT_ROOT} )
 

Build/AtlasLCG/modules/FindDoxygen.cmake

 # Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
 
-# $Id: FindDoxygen.cmake 719980 2016-01-27 08:38:07Z krasznaa $
+# $Id: FindDoxygen.cmake 751138 2016-05-31 13:50:48Z krasznaa $
 #
 # This file is here to intercept find_package(Doxygen) calls, and extend the
 # environment setup file of the project with the correct Doxygen paths.
@@ -33,5 +33,11 @@ if( DOXYGEN_EXECUTABLE )
    get_filename_component( DOXYGEN_BINARY_PATH ${DOXYGEN_EXECUTABLE} PATH )
 endif()
 
+# This is just needed to set up a proper dependency on graphviz:
+if( DOXYGEN_DOT_FOUND )
+   set( GRAPHVIZ_FOUND TRUE )
+endif()
+
 # Set up the RPM dependency:
 lcg_need_rpm( doxygen )
+lcg_need_rpm( graphviz )