创建，添加sdram

rt-thread/components/utilities/resource/SConscript

@@ -0,0 +1,12 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c')
+CPPPATH = [cwd]
+
+if GetDepend('RT_USING_ADT_BITMAP') == False:
+    SrcRemove(src, ['rid_bitmap.c'])
+
+group   = DefineGroup('Utilities', src, depend = ['RT_USING_RESOURCE_ID'], CPPPATH = CPPPATH)
+
+Return('group')