Implicit testdata directory permissions setup added.

data/CMakeLists.txt

@@ -13,6 +13,10 @@ if(INSTALL_TESTS AND OPENCV_TEST_DATA_PATH)
   if(ANDROID)
     install(DIRECTORY ${OPENCV_TEST_DATA_PATH} DESTINATION sdk/etc/testdata COMPONENT tests)
   elseif(NOT WIN32)
-    install(DIRECTORY ${OPENCV_TEST_DATA_PATH} DESTINATION share/OpenCV/testdata COMPONENT tests)
+    # CPack does not set correct permissions by default, so we do it explicitly.
+    install(DIRECTORY ${OPENCV_TEST_DATA_PATH}
+            DIRECTORY_PERMISSIONS OWNER_WRITE OWNER_READ OWNER_EXECUTE
+              GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
+            DESTINATION share/OpenCV/testdata COMPONENT tests)
   endif()
 endif()
\ No newline at end of file