ENH: solve case of WIN32 platform where gdal-config is not found

CMake/ImportGdal.cmake

@@ -40,6 +40,7 @@ IF(OTB_USE_EXTERNAL_GDAL)
   ENDIF (GDALCONFIG_EXECUTABLE)
  
   # Detect if gdal support hdf format
+  IF(NOT WIN32)
   FIND_PROGRAM(GDALCONFIG_EXECUTABLE gdal-config)
   IF (GDALCONFIG_EXECUTABLE)  
      EXECUTE_PROCESS(COMMAND ${GDALCONFIG_EXECUTABLE} --formats
@@ -55,6 +56,10 @@ IF(OTB_USE_EXTERNAL_GDAL)
   ELSE (GDALCONFIG_EXECUTABLE)    
     MESSAGE(WARNING "gdal-config not found")
   ENDIF (GDALCONFIG_EXECUTABLE) 
+  ELSE (NOT WIN32)
+  	# For WIN32 platform, GDAL is automatically build with HDF support.
+    SET(CHECK_GDAL_BUILDED_WITH_HDF 1 CACHE INTERNAL "GDAL_BUILDED_WITH_HDF" FORCE)
+  ENDIF (NOT WIN32)
 
   # Find geotiff headers
   FIND_PATH(GEOTIFF_INCLUDE_DIRS geotiff.h $ENV{GDAL_INCLUDE_DIR} ${GDAL_INCLUDE_DIR} /usr/include/geotiff /usr/include/libgeotiff)