simulator: update to support simulator for linux

bsp/simulator/drivers/SConscript

@@ -1,3 +1,4 @@
+import sys
 from building import *
 
 cwd = GetCurrentDir()
@@ -16,6 +17,9 @@ if GetDepend('RT_USING_DFS_WINSHAREDIR') == False:
     SrcRemove(src, 'dfs_win32.c')
 if GetDepend('RT_USING_MODULE') == False:
     SrcRemove(src, ['module_win32.c'])
+if sys.platform[0:5]=="linux": #check whether under linux
+    SrcRemove(src, ['module_win32.c', 'dfs_win32.c'])
+
 CPPPATH = [cwd]
 
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)