tests: sort & fix includes, remove -include from CFLAGS of acct tests

- Sort the includes of pack.c, moving sys/*.h files near the top.
- Add a couple of missing #include lines, and remove the need for
  custom -include options in the CFLAGS of the test Makefile.
- Remove the ad-hoc 'all' target, but keep its 'regress' bits for
  testing.
- Convert the ad-hoc 'clean' target to proper CLEANFILES stuff,
  so that the normal bsd.prog.mk machinery can clean up.
- Use `make -V .OBJDIR' to detect the place where 'pack' lives,
  so that regress.t works both with and without 'make obj'.

Reviewed by:	uqs
MFC after:	1 week

1 files changed, 6 insertions, 3 deletions

diff --git a/tools/regression/acct/pack.c b/tools/regression/acct/pack.c
index 122b623..d1d3085 100644
--- a/tools/regression/acct/pack.c
+++ b/tools/regression/acct/pack.c
@@ -25,15 +25,18 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/types.h>
+
 #include <assert.h>
 #include <float.h>
+#include <limits.h>
 #include <math.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <strings.h>
-
-#include <sys/time.h>
-#include <sys/types.h>
+#include <syslog.h>
+#include <time.h>
 
 #define KASSERT(val, msg) assert(val)