Fix latent failures of aclocal7.test

[Ralf Wildenhues]

On my system, aclocal7.test would spuriously fail about 1 out of 3
tests.  I tracked that down to an `$AUTOMAKE' creating `Makefile.in'
with a time stamp of the same second as the file `foo' being touched
right before.  This confuses the age comparison done by `ls -1t'.

Addition of the second `$sleep' in the patch below fixes that.  I added
two more for the eventual system where both aclocal and automake finish
before a new second (only a matter of time, and I think 1 second
granularity file systems aren't dead by then).

OK to apply?

Cheers,
Ralf

        * tests/aclocal7.test: Add `$sleep's between file touching
        and automake resp aclocal+automake invocations, to ensure
        they complete with a time stamp strictly later than the touched
        file.

Index: tests/aclocal7.test
===================================================================
RCS file: /cvs/automake/automake/tests/aclocal7.test,v
retrieving revision 1.3
diff -u -r1.3 aclocal7.test
--- tests/aclocal7.test 14 May 2005 20:28:53 -0000      1.3
+++ tests/aclocal7.test 22 Apr 2006 19:36:14 -0000
@@ -89,6 +89,7 @@
 touch fragment.inc
 $sleep
 touch foo
+$sleep
 $ACLOCAL -I m4
 $AUTOMAKE --no-force
 # Only ./Makefile.in should change.
@@ -101,6 +102,7 @@
 : > README
 $sleep
 touch foo
+$sleep
 $AUTOMAKE --no-force
 # Even if no dependency change, the content changed.
 test `ls -1t Makefile.in foo | sed 1q` = Makefile.in
@@ -111,6 +113,7 @@
 : > sub/Makefile.in
 $sleep
 touch foo
+$sleep
 $ACLOCAL -I m4
 $AUTOMAKE --no-force
 # Only sub/Makefile.in should change.