Description: fix to build on non-Linux arches

Fix the build where it seems a code fix for Linux was likely untested
on other systems.
Define SCHED_BATCH in test-schedbatch, for systems that don't have it;
the corresponding RH BZ#741090 patch used the magic value 3 in output.c
anyway.

Bug-Debian: http://bugs.debian.org/677055

testsuite/ps.test/test-schedbatch.c

@@ -15,6 +15,11 @@
 #include <sys/time.h>
 #include <sys/resource.h>
 
+/* Defined in Linux headers only */
+#ifndef SCHED_BATCH
+#define SCHED_BATCH 3
+#endif
+
 int main(int argc, const char *argv[])
 {
 	int nice = 19;