New release of 2.2.0 into indigo fails due to needing newer cmake version

[tfoote]

From: http://build.ros.org/view/Ibin_uT64/job/Ibin_uT64__p2os_driver__ubuntu_trusty_amd64__binary/23/console

09:48:06 	cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_BUILD_TYPE=None -DCATKIN_BUILD_BINARY_PACKAGE=1 -DCMAKE_INSTALL_PREFIX=/opt/ros/indigo -DCMAKE_PREFIX_PATH=/opt/ros/indigo
09:48:06 CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
09:48:06   CMake 3.9.5 or higher is required.  You are running version 2.8.12.2
09:48:06 
09:48:06 

Triggered by ros/rosdistro#20584

[allenh1]

@tfoote going to do a patch release for indigo -- was hoping to just do one more release for that distro.