!18 Packages are now strictly found in local directory

Merge pull request !18 from yanghaoran/master

cmake/ge_utils.cmake

@@ -243,7 +243,7 @@ function(graphengine_add_pkg pkg_name )
             return()
         endif()
     elseif(NOT PKG_HEAD_ONLY)
-        find_package(${__FIND_PKG_NAME} ${PKG_VER} NO_CMAKE_SYSTEM_PATH NO_SYSTEM_ENVIRONMENT_PATH)
+        find_package(${__FIND_PKG_NAME} ${PKG_VER} ${GE_FIND_NO_DEFAULT_PATH})
         if (${__FIND_PKG_NAME}_FOUND)
             set(${pkg_name}_INC ${${pkg_name}_BASE_DIR}/include PARENT_SCOPE)
             message("Found pkg: ${__FIND_PKG_NAME}")