patch for 'make install'

A recent change associated with locating a more useful version
of awk and involving the generation of the diff-prs program
broke 'make install' for some cases.

The break is associated with running the configure/make/make install
from a directory other than the top-level configure resides
(i.e. if one wishes to compile with an objdir).

Please review the following patch which fixes the break...

* Makefile.in: The diff-prs utility is now generated.

diff -u -p -r1.11 Makefile.in
--- Makefile.in 31 Oct 2003 18:56:03 -0000      1.11
+++ Makefile.in 31 Oct 2003 21:27:07 -0000
@@ -409,7 +409,7 @@ install-tools-bin: all-tools
         $(INSTALL_PROGRAM) query-pr $(bindir)/query-pr
         $(INSTALL_PROGRAM) getclose $(bindir)/getclose
         $(INSTALL_SCRIPT) edit-pr $(bindir)/edit-pr
-       $(INSTALL_SCRIPT) $(srcdir)/diff-prs $(libexecdir)/gnats/diff-prs
+       $(INSTALL_SCRIPT) diff-prs $(libexecdir)/gnats/diff-prs
         $(INSTALL_SCRIPT) mail-agent $(libexecdir)/gnats/mail-agent
         $(INSTALL_PROGRAM) file-pr $(libexecdir)/gnats/file-pr
         $(INSTALL_PROGRAM) pr-age $(libexecdir)/gnats/pr-age