Remove testsuite temp files

[Ralf Wildenhues]

Hello Bruno, Eric, all,

With this patch in place, the package generated by
  gnulib-tool --with-tests --test

passes 'make distcheck' on GNU/Linux, yay!  :-)

OK to apply?

Cheers,
Ralf

    * modules/fbufmode-tests (CLEANFILES): Remove temp file.
    * modules/freadable-tests: (CLEANFILES): Likewise.
    * modules/fwritable-tests: (CLEANFILES): Likewise.

diff --git a/modules/fbufmode-tests b/modules/fbufmode-tests
index 2a80746..8c0a760 100644
--- a/modules/fbufmode-tests
+++ b/modules/fbufmode-tests
@@ -8,4 +8,4 @@ configure.ac:
 Makefile.am:
 TESTS += test-fbufmode
 check_PROGRAMS += test-fbufmode
-
+CLEANFILES += t-fbufmode.tmp
diff --git a/modules/freadable-tests b/modules/freadable-tests
index 368465c..4998ebc 100644
--- a/modules/freadable-tests
+++ b/modules/freadable-tests
@@ -9,4 +9,4 @@ configure.ac:
 Makefile.am:
 TESTS += test-freadable
 check_PROGRAMS += test-freadable
-
+CLEANFILES += t-freadable.tmp
diff --git a/modules/fwritable-tests b/modules/fwritable-tests
index ed72541..b75eb3b 100644
--- a/modules/fwritable-tests
+++ b/modules/fwritable-tests
@@ -9,4 +9,4 @@ configure.ac:
 Makefile.am:
 TESTS += test-fwritable
 check_PROGRAMS += test-fwritable
-
+CLEANFILES += t-fwritable.tmp