tests: add '/bin/ip' to deps in addition to '/sbin/ip'

Some distros put 'ip' util in /bin directory.

travis-ci: success for tests: add '/bin/ip' to deps in addition to '/sbin/ip'
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/static/bridge.desc

 {   'deps': [   '/bin/sh',
                 '/usr/bin/sort',
                 '/bin/grep',
-                '/sbin/ip',
+                '/sbin/ip|/bin/ip',
                 '/usr/bin/diff'],
     'flags': 'suid',
     'flavor': 'ns uns'}

test/zdtm/static/cr_veth.desc

-{   'deps': ['/bin/sh', '/bin/sed', '/bin/grep', '/sbin/ip', '/usr/bin/diff'],
+{   'deps': ['/bin/sh', '/bin/sed', '/bin/grep', '/sbin/ip|/bin/ip', '/usr/bin/diff'],
     'flags': 'suid',
     'flavor': 'ns uns',
     'ropts': '--external veth[zdtmvthc0]:zdtmvthh0@zdtmbr0'}

test/zdtm/static/macvlan.desc

 {   'deps': [   '/bin/sh',
                 '/usr/bin/sort',
                 '/bin/grep',
-                '/sbin/ip',
+                '/sbin/ip|/bin/ip',
                 '/usr/bin/diff'],
     'flags': 'suid',
     'flavor': 'ns uns',

test/zdtm/static/netns.desc

-{   'deps': ['/bin/sh', '/sbin/ip', '/usr/bin/diff'],
+{   'deps': ['/bin/sh', '/sbin/ip|/bin/ip', '/usr/bin/diff'],
     'flags': 'suid',
     'flavor': 'ns uns'}