Add support for architecture sparc-v8 and soc bm3803.

libcpu/sparc-v8/SConscript

@@ -0,0 +1,16 @@
+# RT-Thread building script for bridge
+
+import os
+from building import *
+
+Import('rtconfig')
+
+cwd = GetCurrentDir()
+
+# add common code files
+group = SConscript(os.path.join('common', 'SConscript'))
+
+# cpu porting code files
+group = group + SConscript(os.path.join(rtconfig.CPU, 'SConscript'))
+
+Return('group')