Incorporate bsdmake into buildsystem and reorganize libs

lib/libsys/assert.c

@@ -0,0 +1,14 @@
+/*
+ * assert.c - diagnostics
+ */
+
+#include	<assert.h>
+#include	<stdio.h>
+#include	<minix/config.h>
+#include	<minix/const.h>
+#include	<minix/sysutil.h>
+
+void __bad_assertion(const char *mess) {
+	printf("%s", mess);
+	panic(NULL, NULL, NO_NUM);
+}