Avoid parallel-tests as it remove
buildtest-TESTS and runtest-TESTS targets

Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Upstream-Status: Inappropriate (disable feature incompatible with ptest) 

diff -ruN a/configure.ac b/configure.ac
--- a/configure.ac	2013-09-02 15:05:18.662366800 +0200
+++ b/configure.ac	2013-09-02 15:05:49.557066764 +0200
@@ -8,7 +8,7 @@
 AC_CONFIG_SRCDIR([libkmod/libkmod.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AM_INIT_AUTOMAKE([check-news foreign 1.11 silent-rules
-	tar-pax no-dist-gzip dist-xz subdir-objects color-tests parallel-tests])
+	tar-pax no-dist-gzip dist-xz subdir-objects color-tests])
 AC_PROG_CC_STDC
 AC_USE_SYSTEM_EXTENSIONS
 AC_SYS_LARGEFILE