Ignore unsigned module build products

Along with the addition of signed kernel modules in newer kernel
we have a few new build products we need to ignore.   LKLM has the
whole thread for those interested: http://lkml.org/lkml/2007/2/14/164

.gitignore

@@ -15,6 +15,9 @@
 #
 *.[oa]
 *.ko
+*.ko.unsigned
+*.ko.out
+*.ko.out.sig
 *.lo
 *.la
 *.mod.c