smstools3 : ADD smstools3 package

Add smstools3 package from http://smstools3.kekekasvi.com/

Tested successfull as an email/sms gateway with :
- Device: ID 12d1:1001 Huawei Technologies Co., Ltd. E169/E620/E800 HSDPA Modem
- Trunk: OpenWrt Chaos Calmer r43753
- Kirkwood : Globalscale Technologies Guruplug Server Plus

Send and receive SMS with modem : OK
Forward received SMS to mailhub : OK

Signed-off-by: Gerald Kerma <dreagle@doukki.net>

utils/smstools3/patches/001-smsd.patch

@@ -0,0 +1,13 @@
+--- a/src/smsd.c	2010-09-21 13:47:48.000000000 +0300
++++ b/src/smsd.c	2013-03-05 05:26:26.000000000 +0300
+@@ -5200,8 +5200,8 @@
+ 	int result = 1;
+ 	char *cmd;
+ 	char *p;
+-	char answer[500];
+-	char buffer[600];
++	char answer[1024];
++	char buffer[1024];
+ 	int fd;
+ 	int log_retry = 3;
+ 	int i;