[FreeBSD] GRASS inverse searching order

+1 with @neteler
"start with searching the newest GRASS GIS version first"
#9174 (comment)

cc  @rhurlin

Author: lbartoletti

cmake/FindGRASS.cmake

@@ -160,8 +160,8 @@ ENDIF (WIN32)
 IF (UNIX)
   IF (GRASS_FIND_VERSION EQUAL 7)
     IF (CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
-        FOREACH (VERSION_MINOR 0 1 2 3 4 5 6)
-            FOREACH (VERSION_BUILD 0 1 2 3 4 5 6)
+        FOREACH (VERSION_MINOR 9 8 7 6 5 4 3 2 1 0)
+            FOREACH (VERSION_BUILD 9 8 7 6 5 4 3 2 1 0)
                 LIST (APPEND GRASS_PATHS /usr/local/grass-${GRASS_FIND_VERSION}.${VERSION_MINOR}.${VERSION_BUILD})
             ENDFOREACH (VERSION_BUILD)
         ENDFOREACH(VERSION_MINOR)