cmake HAVE_DART_H examples

skyjake/Doomsday-Engine doomsday/external/fluidsynth/CMakeLists.txt :183

check_include_file ( os2me.h HAVE_DART_H )

glKarin/com.n0n3m4.diii4a Q3E/src/main/jni/deplibs/fluidsynth/CMakeLists.txt :597

check_include_files ( "os2.h;os2me.h" HAVE_DART_H )

FluidSynth/fluidsynth CMakeLists.txt :387

check_include_files ( "os2.h;os2me.h" HAVE_DART_H )