[Mrql Wiki] Update of "Contributors" by LeonidasFegaras

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The "Contributors" page has been changed by LeonidasFegaras:
https://wiki.apache.org/mrql/Contributors?action=diff&rev1=6&rev2=7

  git clone https://git-wip-us.apache.org/repos/asf/incubator-mrql.git
  }}}
  
- To build MRQL using maven, use {{{mvn clean install}}} for Hadoop 1.* or {{{mvn -Dyarn clean install}}} for Hadoop 2.* (Yarn). To validate the installation use {{{mvn -DskipTests=false clean install}}},
+ To build MRQL using maven, use {{{mvn clean install}}} for Hadoop 2.* (Yarn) or {{{mvn -Dhadoop1 clean install}}} for Hadoop 1.*. To validate the installation use {{{mvn -DskipTests=false clean install}}},
  which runs the queries in {{{tests/queries}}} in memory, local Hadoop mode, local Hama mode, Spark mode, and Flink mode.