Allocate 4 slots on stack before calling main, in case it saves its argument

registers.
Remove reference to deleted v850ea port.
Do not use -mv850 when building for v850e target.  This prevents the ctbp
system register from being initialised.

newlib/configure.host

@@ -206,11 +206,7 @@ case "${host_cpu}" in
 	;;
   v850e)
 	machine_dir=v850
-	newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -mv850 "
-	;;
-  v850ea)
-	machine_dir=v850
-	newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -mv850 "
+	newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED "
 	;;
   w65*)
 	machine_dir=w65