pgsql: Second attempt at fixing MSVC build for 68ab8e8ba4a471d9.

Second attempt at fixing MSVC build for 68ab8e8ba4a471d9.

After the previous fix in 6f1f34c9 msvc ended up looking for psqlscan.c
in the wrong directory.

David's fix just forces the path to be adjusted. That's not a
particularly pretty fix, but it hopefully will make the buildfarm green
again.

Author: David Rowley
Discussion: CAKJS1f_9CCi_t+LEgV5GWoCj3wjavcMoDc5qfcf_A0UwpQoPoA@mail.gmail.com

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/326d73c86fda407a810675c3b5a48e0a0cc992f5

Modified Files
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src/tools/msvc/Mkvcbuild.pm | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)