Update coverity build profile

Add a few more plugins and remove go that does not build.
plugins/v8: fix double free

Reported by Coverity as CID #1125166
plugins/xslt: fix xmlfile lifecycle

Fixes an use after free and a memory leak.

Reported by Coverity as CID #1125165, #1125167
plugins/xslt: fix memory leaks

Rpeorted by Coverity as CID #1125164
plugins/pty: Fix a couple of memory issues

Rpoerted by Coverity as CID #1125163 and #1125162
plugins/xslt: correct logical operator

Fixes a null pointer dereference.

Reported by Coverity as CID #1125160
Merge pull request #439 from xrmx/coverity0211

More Coverity fixes