ENH: OTB_GL_USE_ACCEL exported to OTBConfig.cmake.in

OTBConfig.cmake.in

@@ -87,6 +87,9 @@ SET(FLTK_PLATFORM_DEPENDENT_LIBS "@FLTK_PLATFORM_DEPENDENT_LIBS@")
 SET(OTB_USE_VISU_GUI "@OTB_USE_VISU_GUI@")
 SET(OTB_VISU_GUI_LIBRARIES "@OTB_VISU_GUI_LIBRARIES@")
 
+# Video card acceleration
+SET(OTB_GL_USE_ACCEL "@OTB_GL_USE_ACCEL@")
+
 # The list of OTB/Utilities IO libraries
 SET(OTB_IO_UTILITIES_DEPENDENT_LIBRARIES "@OTB_IO_UTILITIES_DEPENDENT_LIBRARIES@")