Fix omission of -X (--no-psqlrc) in some psql invocations.

As of commit d5563d7df, psql -c no longer implies -X, but not all of
our regression testing scripts had gotten that memo.

To ensure consistency of results across different developers, make
sure that *all* invocations of psql in all scripts in our tree
use -X, even where this is not what previously happened.

Michael Paquier and Tom Lane

src/tools/find_static

@@ -47,4 +47,4 @@ echo "
 	from 	debug2
 	where	scope = 'T' and func != 'main'
         order by file, func;
-" |psql debug
+" |psql -X debug