[Halld-online] gcc version for hdsys

[Hovane Egiyan]

Hi,

the version of the gcc compiler was changed some time ago announced for all
"hdsys" account in the shell initialization script to version 4.8. I 
restored it back to 4.4.7,
the default version for RHEL6.4. Anyone who wants to build his/her 
online code using gcc 4.8 is
welcome to do so for their code at their own risk, but the version 4.8 
is not officially
supported on the online machines.

Best,
     Hovanes