stage1: ensure systemd-tmpfiles is available in pod

[lucab]

TestAppSandboxSmoke is currently failing on host and src flavors because:

• stage1-host is missing a /bin directory
• stage1-host doesn't install systemd-tmpfiles from host
• stage1-src is built without systemd-tmpfiles

This should fix testsuite failures on those flavors.

[lucab]

This also addresses #3424 (comment).

/cc @evverx

[s-urbaniak]

LGTM on green 👍

[s-urbaniak]

rekicked CI due to flakiness

[evverx]

@lucab, thanks!
The TestFetchFromFile hangs:

25074 ?        Ss     0:08 tmux
25075 pts/1    Ss     0:00  \_ -bash
21617 pts/1    S+     0:02  |   \_ make functional-check
22942 pts/1    S+     0:00  |   |   \_ /usr/bin/bash -c set -e; \ printf '  %-12s %s\n' 'GO TEST' "github.com/coreos/rkt/tests"; \ sudo RKT_STAGE1_DEFAULT_FLAVOR="src" \ ?RKT="/home/vagrant/rkt-gopath/src
22943 pts/1    S+     0:00  |   |       \_ sudo RKT_STAGE1_DEFAULT_FLAVOR=src RKT=/home/vagrant/rkt-gopath/src/github.com/coreos/rkt/build-rkt-1.20.0+git/tmp/functional/rkt ACTOOL=/home/vagrant/rkt-gopath
22944 pts/1    Sl+    0:00  |   |           \_ /usr/bin/go test -tags src -timeout 60m -v github.com/coreos/rkt/tests
23338 pts/1    Sl+    0:07  |   |               \_ /tmp/go-build197934847/github.com/coreos/rkt/tests/_test/tests.test -test.timeout=60m -test.v=true
20211 pts/15   Ss+    0:04  |   |                   \_ stage1/rootfs/lib64/ld-linux-x86-64.so.2 stage1/rootfs/usr/bin/systemd-nspawn --boot --notify-ready=yes -Zsystem_u:system_r:svirt_lxc_net_t:s0:c8,c35

$ sudo strace -p 20211 -yy -s 500 -v
strace: Process 20211 attached
writev(2</dev/pts/15>, [{iov_base="Container rkt-7c124d22-c6ce-415e-a61b-3a83e648a94a exited successfully.", iov_len=71}, {iov_base="\n", iov_len=1}], 2^Cstrace: Process 20211 detached
 <detached ...>

But seems like that's unrelated to this PR

[lucab]

@evverx yes, it is an unrelated problem (exacerbated by some recent increase in debug output). See #3443 for a fix and explanation. Which environment are you using for running the testsuite? Can you check if you spot any other hanging tests?

[evverx]

Which environment are you using for running the testsuite?

           Chassis: vm
    Virtualization: oracle
  Operating System: Fedora 24 (Cloud Edition)
       CPE OS Name: cpe:/o:fedoraproject:fedora:24
            Kernel: Linux 4.8.10-200.fc24.x86_64
      Architecture: x86-64

$ ./build-rkt-1.20.0+git/target/bin/rkt version
rkt Version: 1.20.0+gitf5e1238
appc Version: 0.8.9
Go Version: go1.7.4
Go OS/Arch: linux/amd64
Features: +TPM +SDJOURNAL

Can you check if you spot any other hanging tests?

My last attempt was successful (all tests passed).

See #3443 for a fix and explanation

I'll take a look. Thanks!