treewide: fix shellscript syntax errors/typos

Fix multiple syntax errors in shelscripts (of packages only)
These errors were causing many conditions to not working properly

Signed-off-by: Lorenzo Santina <lorenzo.santina@edu.unito.it>
[increase PKG_RELEASE, drop command substitution from directip.sh]
Signed-off-by: Mathias Kresin <dev@kresin.em>

package/network/utils/comgt/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=comgt
 PKG_VERSION:=0.32
-PKG_RELEASE:=29
+PKG_RELEASE:=30
 
 PKG_SOURCE:=$(PKG_NAME).$(PKG_VERSION).tgz
 PKG_SOURCE_URL:=@SF/comgt

package/network/utils/comgt/files/3g.sh

@@ -109,4 +109,4 @@ proto_3g_teardown() {
 	proto_kill_command "$interface"
 }
 
-[ -z "NOT_INCLUDED" ] || add_protocol 3g
+[ -z "$NOT_INCLUDED" ] || add_protocol 3g

package/network/utils/comgt/files/directip.sh

@@ -44,8 +44,7 @@ proto_directip_setup() {
 		return 1
 	}
 
-	cardinfo=$(gcom -d "$device" -s /etc/gcom/getcardinfo.gcom)
-	[ -n $(echo "$cardinfo" | grep -q "Sierra Wireless") ] || {
+	gcom -d "$device" -s /etc/gcom/getcardinfo.gcom | grep -q "Sierra Wireless" || {
 		proto_notify_error "$interface" BAD_DEVICE
 		proto_block_restart "$interface"
 		return 1