More thread names.

src/cmd/acme/acme.c

@@ -341,6 +341,7 @@ shutdownthread(void *v)
 
 	USED(v);
 
+	threadsetname("shutdown");
 	c = threadnotechan();
 	while((msg = recvp(c)) != nil)
 		shutdown(nil, msg);

src/cmd/acme/exec.c

@@ -1323,6 +1323,8 @@ runproc(void *argvp)
 	void **argv;
 	CFsys *fs;
 
+	threadsetname("runproc");
+
 	argv = argvp;
 	win = argv[0];
 	s = argv[1];

src/cmd/acme/fsys.c

@@ -139,6 +139,8 @@ fsysproc(void *v)
 	Fcall t;
 	uchar *buf;
 
+	threadsetname("fsysproc");
+
 	USED(v);
 	x = nil;
 	for(;;){