file.c: move access and faccessat parsers to a separate file

* access.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* file.c: Move sys_access, sys_faccessat and related code to access.c.
diff --git a/access.c b/access.c
new file mode 100644
index 0000000..f28f69d
--- /dev/null
+++ b/access.c
@@ -0,0 +1,30 @@
+#include "defs.h"
+
+#include <fcntl.h>
+
+#include "xlat/access_flags.h"
+
+static int
+decode_access(struct tcb *tcp, int offset)
+{
+	if (entering(tcp)) {
+		printpath(tcp, tcp->u_arg[offset]);
+		tprints(", ");
+		printflags(access_flags, tcp->u_arg[offset + 1], "?_OK");
+	}
+	return 0;
+}
+
+int
+sys_access(struct tcb *tcp)
+{
+	return decode_access(tcp, 0);
+}
+
+int
+sys_faccessat(struct tcb *tcp)
+{
+	if (entering(tcp))
+		print_dirfd(tcp, tcp->u_arg[0]);
+	return decode_access(tcp, 1);
+}