Added the gcc package to the yum command for Passenger on Enterprise Linux. Without gcc, gem install passenger will not run successfully

Committer: mlehner616 <mlehner616@puppetopen1.davenport.edu>
Merge pull request #153 from mlehner616/259e8cd12f7138a79a9cfb8eb1de9f816a950865

Added gcc to the list of packages required to install Passenger on Enterprise Linux.
Toolchain walkthrough