merge mpi host assist process into mcexec,

use syscall instead of another ikc

Conflicts:

	kernel/syscall.c
	linux/executer/mcexec.c

linux/executer/Makefile

@@ -3,7 +3,7 @@ CFLAGS = -O3 -Wall -g -pthread
 all: mcexec
 
 mcexec: mcexec.c
-	$(CC) $(CFLAGS) -o $@ $^
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -o $@ $^ $(EXTRA_OBJS)
 
 clean:
 	rm -f mcexec