SVN r346316 breaks build

[Michael Butler]

There seems to be a missing include here?

===> usr.bin/strings (obj,all,install)
Building
/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/usr.bin/strings/strings.o
/usr/src/contrib/elftoolchain/strings/strings.c:198:55: error: use of
undeclared identifier 'FA_OPEN'
        fa = fileargs_init(argc, argv, O_RDONLY, 0, &rights, FA_OPEN);
                                                             ^
1 error generated.
*** [strings.o] Error code 1

make[3]: stopped in /usr/src/usr.bin/strings

	imb