New 'benchmarks' dir in test/, with first benchmark - unixbench-5.1.2, ported

by Karol Sobczak.

test/Makefile

@@ -16,9 +16,12 @@ BIGOBJ=  test20 test24
 ROOTOBJ= test11 test33 test43 test46
 GCCOBJ=  test45-gcc
 
-all:	$(OBJ) $(BIGOBJ) $(GCCOBJ) $(ROOTOBJ)
+all:	$(OBJ) $(BIGOBJ) $(GCCOBJ) $(ROOTOBJ) Benchmarks
 	chmod 755 *.sh run
 
+Benchmarks:
+	cd benchmarks && for d in *bench*; do cd $$d && $(MAKE) || exit 1; done
+
 $(OBJ):
 	$(CC) $(CFLAGS) -o $@ $@.c
 
@@ -35,6 +38,7 @@ $(ROOTOBJ):
 
 clean:	
 	cd select && make clean
+	cd benchmarks && for d in *bench*; do cd $$d && $(MAKE) clean || exit 1; done
 	-rm -rf *.o *.s *.bak test? test?? test??-gcc t10a t11a t11b \
 		t40a t40b t40c t40d t40e t40f t43 DIR*