Ubiquitous\RT_Thread\:add Kconfig file and SConscript file in drivers folder

Ubiquitous/RT_Thread/drivers/Kconfig

@@ -0,0 +1,5 @@
+menu "More Drivers"
+
+#source "$RT_Thread_DIR/drivers/rw007/Kconfig"
+#source "$RT_Thread_DIR/drivers/ov2640/Kconfig"
+endmenu

Ubiquitous/RT_Thread/drivers/SConscript

@@ -0,0 +1,14 @@
+import os
+Import('RTT_ROOT')
+from building import *
+
+cwd = GetCurrentDir()
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(path, 'SConscript'))
+
+Return('objs')