`llgo run` should raise running errors

[cpunion]

Case:

package main

func main() {
	var p *int = nil
	*p = 0
}

Expect:

$ go run ./main.go
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x104f9aa34]

goroutine 1 [running]:
main.main()
	/Users/lijie/test/go/crash/main.go:5 +0x4
exit status 2
$ echo $?
1

Got:

$ llgo run ./main.go
$ echo $?
0
$ llgo build -o main main.go
# command-line-arguments
$ ./main
[1]    66960 segmentation fault  ./main
$ crash echo $?
139