"Add add sudo support.." typo (#1569)

Author: samruddhikhandale

src/base-alpine/library-scripts/common-alpine.sh

@@ -138,7 +138,7 @@ else
     fi
 fi
 
-# Add add sudo support for non-root user
+# Add sudo support for non-root user
 if [ "${USERNAME}" != "root" ] && [ "${EXISTING_NON_ROOT_USER}" != "${USERNAME}" ]; then
     echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME
     chmod 0440 /etc/sudoers.d/$USERNAME