ndctl: update .gitignore

Add a few files and dirs to .gitignore:
  - cscope.* (since we already ignore 'tags')
  - release/ (created by scripts/prepare_release)
  - scripts/docsurgeon_parser.sh (parser generated by argbash)

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vishal Verma <[email protected]>

Author: stellarhopper

.gitignore

@@ -1,5 +1,8 @@
 build/
+release/
 rhel/ndctl.spec
 sles/ndctl.spec
 *.swp
 tags
+cscope.*
+scripts/docsurgeon_parser.sh