Open up sub-directory group write permissions

Scripts processing the files added to the "archivedir" directory may actually
want to remove files that have been processed.  Extend the "group" privs to allow
removing files.

Note: ownership of the "archivedir" dirs/files will be "asterisk:asterisk"

apps/app_rpt.c

@@ -4735,7 +4735,7 @@ static void *rpt(void *this)
 	if (myrpt->p.archivedir)
 		mkdir(myrpt->p.archivedir, 0700);
 	sprintf(tmpstr, "%s/%s", myrpt->p.archivedir, myrpt->name);
-	mkdir(tmpstr, 0755);
+	mkdir(tmpstr, 0775);
 	myrpt->ready = 0;
 	rpt_mutex_lock(&myrpt->lock);
 	myrpt->remrx = 0;
@@ -7032,7 +7032,7 @@ static int rpt_exec(struct ast_channel *chan, const char *data)
 
 		mkdir(myrpt->p.archivedir, 0700);
 		sprintf(mycmd, "%s/%s", myrpt->p.archivedir, myrpt->name);
-		mkdir(mycmd, 0755);
+		mkdir(mycmd, 0775);
 		time(&myt);
 		strftime(mydate, sizeof(mydate) - 1, "%Y%m%d%H%M%S", localtime(&myt));
 		sprintf(mycmd, "mixmonitor start %s %s/%s/%s.wav49 a", ast_channel_name(chan), myrpt->p.archivedir, myrpt->name,