Set rpath for plperl and plpython to ensure we can find the .so files

for the languages even when not installed in a standard directory.
pltcl may need this treatment as well, but we don't have the right path
conveniently available, so I'll leave it alone as long as there aren't
actual reports of trouble.

src/pl/plperl/GNUmakefile

 # Makefile for PL/Perl
-# $PostgreSQL: pgsql/src/pl/plperl/GNUmakefile,v 1.17 2004/11/17 21:23:36 tgl Exp $
+# $PostgreSQL: pgsql/src/pl/plperl/GNUmakefile,v 1.18 2004/11/19 19:22:58 tgl Exp $
 
 subdir = src/pl/plperl
 top_builddir = ../../..
@@ -25,6 +25,8 @@ endif
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS) -I$(perl_archlibexp)/CORE
 
+rpathdir = $(perl_archlibexp)/CORE
+
 
 NAME = plperl
 SO_MAJOR_VERSION = 0

src/pl/plpython/Makefile

-# $PostgreSQL: pgsql/src/pl/plpython/Makefile,v 1.17 2004/10/11 19:32:19 tgl Exp $
+# $PostgreSQL: pgsql/src/pl/plpython/Makefile,v 1.18 2004/11/19 19:23:01 tgl Exp $
 
 subdir = src/pl/plpython
 top_builddir = ../../..
@@ -33,7 +33,8 @@ endif
 ifneq (,$(findstring yes, $(shared_libpython)$(allow_nonpic_in_shlib)))
 
 override CPPFLAGS := -I$(srcdir) $(python_includespec) $(CPPFLAGS)
-rpath :=
+
+rpathdir = $(python_libdir)
 
 NAME = plpython
 SO_MAJOR_VERSION = 0