resources.conf: Label modems according to their type

It's difficult to know which path is which, and actually in the prod env
gobi_0 is given to gobi 2000 instead of EC20, which means the attributes
would be applying to the wrong resource.

Change-Id: If17ff9f3d9c4c74bf0aa7966b1dd2f878175a8f0
diff --git a/example/resources.conf b/example/resources.conf
index 26e1d80..497626d 100644
--- a/example/resources.conf
+++ b/example/resources.conf
@@ -83,7 +83,7 @@
   ciphers: [a5_0, a5_1]
   features: ['sms', 'voice', 'ussd']
 
-- label: gobi_0
+- label: ec20
   path: '/gobi_0'
   imsi: '901700000009030'
   ki: 'BB70807226393CDBAC8DD3439FF54252'
@@ -91,7 +91,7 @@
   ciphers: [a5_0, a5_1]
   features: ['sms', 'ussd', 'gprs']
 
-- label: gobi_3
+- label: gobi2k
   path: '/gobi_3'
   imsi: '901700000009032'
   ki: '2F70DCA43C45ACB97E947FDD0C7CA30A'