[libc] Add CodeSourcery G++ lite check.

components/cplusplus/crt_init.c

@@ -31,9 +31,10 @@ extern void $Super$$__cpp_initialize__aeabi_(void);
 /* we need to change the cpp_initialize order */
 void $Sub$$__cpp_initialize__aeabi_(void)
 {
-	/* empty */
+    /* empty */
 }
-#elif defined(__GNUC__)
+#elif defined(__GNUC__) && !defined(__CS_SOURCERYGXX_MAJ__)
+/* The _init()/_fini() routines has been defined in codesourcery g++ lite */
 void _init()
 {
 }