added .gradle to the top-level gitignore
added .gradle to the top-level gitignore

WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules