Improve thread error message.

configure

@@ -19172,6 +19172,8 @@ echo "$as_me: error: Can not build thread test proram." >&2;}
    { (exit 1); exit 1; }; })
 $srcdir/src/tools/thread/thread_test >&5 ||
 	( rm -f src/Makefile.global
+	  echo
+	  echo
 	  $srcdir/src/tools/thread/thread_test
 	  { { echo "$as_me:$LINENO: error: Thread test program failed.  Your platform is not thread-safe." >&5
 echo "$as_me: error: Thread test program failed.  Your platform is not thread-safe." >&2;}

configure.in

 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.330 2004/04/26 00:29:24 momjian Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.331 2004/04/26 00:32:00 momjian Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -1231,6 +1231,8 @@ $MAKE -C $srcdir/src/tools/thread >&5 ||
 	  AC_MSG_ERROR([Can not build thread test proram.]))
 $srcdir/src/tools/thread/thread_test >&5 ||
 	( rm -f src/Makefile.global
+	  echo
+	  echo
 	  $srcdir/src/tools/thread/thread_test
 	  AC_MSG_ERROR([Thread test program failed.  Your platform is not thread-safe.]))
 $MAKE -C $srcdir/src/tools/thread clean >&5 ||