PKG: set OTB install directory from OTB_MODULES_DIR because we got find_package

SuperBuild/Packaging/CMakeLists.txt

@@ -59,6 +59,7 @@ else(OUT_OF_SOURCE_BUILD)
   set(SUPERBUILD_INSTALL_DIR ${SB_INSTALL_PREFIX})
   if(WIN32 OR CMAKE_CROSSCOMPILING)
     set(MONTEVERDI_INSTALL_DIR ${CMAKE_INSTALL_PREFIX})
+    set(OTB_INSTALL_DIR "${OTB_MODULES_DIR}/../../../..")
   endif()
 endif(OUT_OF_SOURCE_BUILD)