pgsql: Make configure probe for the location of the <uuid.h> header

Log Message:
-----------
Make configure probe for the location of the <uuid.h> header file.
Needed to accommodate different layout on some platforms (Debian for
one). Heikki Linnakangas

Modified Files:
--------------
pgsql:
configure (r1.563 -> r1.564)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.563&amp;r2=1.564)
configure.in (r1.529 -> r1.530)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.529&amp;r2=1.530)
pgsql/contrib/uuid-ossp:
uuid-ossp.c (r1.2 -> r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/uuid-ossp/uuid-ossp.c?r1=1.2&amp;r2=1.3)
pgsql/src/include:
pg_config.h.in (r1.123 -> r1.124)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.in?r1=1.123&amp;r2=1.124)