Added .gitignore for NM Debian package build

src/charon/plugins/nm/.gitignore

@@ -0,0 +1 @@
+network-manager-strongswan_*

src/charon/plugins/nm/gnome/.gitignore

@@ -6,3 +6,5 @@ intltool-update.in
 mkinstalldirs
 nm-strongswan-service.name
 stamp-h1
+config.guess.cdbs-orig
+config.sub.cdbs-orig

src/charon/plugins/nm/gnome/debian/.gitignore

@@ -0,0 +1,6 @@
+files
+network-manager-strongswan.debhelper.log
+network-manager-strongswan.substvars
+network-manager-strongswan/
+stamp-autotools-files
+stamp-makefile-build