Update tocDefinitions.rst

Second fix in docs needed for https://github.com/Itseez/opencv_contrib/pull/70
http://www.build.opencv.org/buildbot/builders/precommit-contrib_docs/builds/277
fix for ocl_morphSmall
fixed ocl_boxFilter
Merge pull request #3144 from ElenaGvozdeva:ocl_morphSmall
Merge pull request #3139 from bmagyar:patch-2
ORB crashed with no keypoints present
ORB.cl : fixed redefinition of val
Merge pull request #3153 from PhilLab:patch-3
CUDA optical flow stubs: missing parameter
PnP solver: fixed element-wise access
Merge pull request #3151 from PhilLab:orbNoKeypoints
Merge pull request #3154 from PhilLab:patch-4
Merge pull request #3157 from PhilLab:pnpFix