Log Message:
-----------
Change build of regress.so to use Makefile.shlib instead of depending
on the not-very-good .so pattern rules in the port-specific Makefiles.
(This leaves only pgxs' MODULES case needing those rules.) Also,
compile pgsleep.c locally and add it to regress.so to avoid failure
on AIX.
Modified Files:
--------------
pgsql/src/test/regress:
GNUmakefile (r1.50 -> r1.51)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/GNUmakefile.diff?r1=1.50&r2=1.51)