[csw-buildfarm] Please install py_yaml

[Yann Rouillard]

Please install py_yaml on current10s, checkpkg needs it:

gmake: Entering directory `/home/yann/mgar/openssh/trunk'
[===== NOW BUILDING: openssh-5.4p1 =====]
  ==> Verifying for installed package CSWpy-yaml: MISSING
gmake: *** [prerequisitepkg-CSWpy-yaml] Error 1
gmake: Leaving directory `/home/yann/mgar/openssh/trunk'
Connection to current10x closed.

Yann