Fix moc error with Qt 4.8.7 and Boost 1.58 in xenial

[meyerj]

I needed this patch to compile the indigo-devel branch (or the latest released version 1.11.18) successfully in Ubuntu Xenial with Boost 1.58 and Qt 4.8.7 for a custom build of ros-indigo-desktop-full from source:

Generating moc_robot.cpp
usr/include/boost/type_traits/detail/has_binary_operator.hp:50: Parse error at "BOOST_JOIN"
AUTOGEN: error: process for /home/jenkins/workspace/ros-indigo-xenial/rviz/obj-x86_64-linux-gnu/src/rviz/moc_robot.cpp failed:
usr/include/boost/type_traits/detail/has_binary_operator.hp:50: Parse error at "BOOST_JOIN"

Generating moc_robot_joint.cpp
usr/include/boost/type_traits/detail/has_binary_operator.hp:50: Parse error at "BOOST_JOIN"
AUTOGEN: error: process for /home/jenkins/workspace/ros-indigo-xenial/rviz/obj-x86_64-linux-gnu/src/rviz/moc_robot_joint.cpp failed:
usr/include/boost/type_traits/detail/has_binary_operator.hp:50: Parse error at "BOOST_JOIN"

Generating moc_robot_link.cpp
usr/include/boost/type_traits/detail/has_binary_operator.hp:50: Parse error at "BOOST_JOIN"
AUTOGEN: error: process for /home/jenkins/workspace/ros-indigo-xenial/rviz/obj-x86_64-linux-gnu/src/rviz/moc_robot_link.cpp failed:
usr/include/boost/type_traits/detail/has_binary_operator.hp:50: Parse error at "BOOST_JOIN"

$ dpkg -l libqt4-dev libboost1.58-dev
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                   Version                Architecture Description
+++-======================-======================-============-=====================================
ii  libboost1.58-dev:amd64 1.58.0+dfsg-5ubuntu3.1 amd64        Boost C++ Libraries development files
ii  libqt4-dev             4:4.8.7+dfsg-5ubuntu2  amd64        Qt 4 development files

[dhood]

Thanks for the patch; this matches what is recommended in https://bugreports.qt.io/browse/QTBUG-22829 as a workaround for qt4 + boost 1.58. While this isn't a targeted combination, others are interested in it (#1153) and this is simple enough to merge, so +1