pgsql: Add output directory argument to generate-unicode_norm_table.pl

Add output directory argument to generate-unicode_norm_table.pl

This is in preparation for building postgres with meson / ninja.

When building with meson, commands are run at the root of the build tree. Add
an option to put build output into the appropriate place.

Author: Andres Freund <andres(at)anarazel(dot)de>
Author: Peter Eisentraut <peter(at)eisentraut(dot)org>
Author: Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com>
Discussion: https://postgr.es/m/5e216522-ba3c-f0e6-7f97-5276d0270029@enterprisedb.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/c8a9246e09cc2786923df8e5abf3c9c317f3493c

Modified Files
--------------
src/common/unicode/generate-unicode_norm_table.pl | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)