Create .gitignore

This .gitignore file ignores every file which is removed by "make clean"

.gitignore

@@ -0,0 +1,20 @@
+*.pp
+*.py[co]
+*.res
+
+/base.conf
+/base.fc
+/doc/global_booleans.xml
+/doc/global_tunables.xml
+/doc/html/
+/doc/policy.xml
+/file_contexts
+/homedir_template
+/net_contexts
+/policy.conf
+/policy.[0-9]*
+/policy/booleans.conf
+/policy/modules.conf
+/policy/modules/kernel/corenetwork.if
+/policy/modules/kernel/corenetwork.te
+/tmp/