add various loplugin results files

so that instead of trying to maintain a list of false positives inside
the python processing code, I can just run the plugin, generate the
result, and then look at the git diff from last time.

Change-Id: Ic287f19e3b139705222a1f9541ad6471dfcb9c18

compilerplugins/clang/unnecessaryvirtual.py

@@ -57,7 +57,7 @@ def natural_sort_key(s, _nsre=re.compile('([0-9]+)')):
 # sort results by name and line number
 tmp1list = sorted(unnecessaryVirtualSet, key=lambda v: natural_sort_key(v[1]))
 
-with open("loplugin.unnecessaryvirtual.report", "wt") as f:
+with open("compilerplugins/clang/unnecessaryvirtual.results", "wt") as f:
     for t in tmp1list:
         f.write( t[1] + "\n" )
         f.write( "    " + t[0] + "\n" )