add definition of constraints #3182

Job	Run time
ubuntu-clang-deprecated Debug	21m 55s
ubuntu-clang-deprecated Release	23m 52s
ubuntu-clang-quaternions Debug	22m 23s
ubuntu-clang-quaternions Release	23m 23s
ubuntu-clang-tbb Debug	24m 41s
ubuntu-clang-tbb Release	25m 0s
ubuntu-clang-cayleymap Debug	22m 14s
ubuntu-clang-cayleymap Release	23m 39s
ubuntu-clang-system-libs Debug	21m 53s
ubuntu-clang-system-libs Release	22m 36s
ubuntu-no-boost Debug	22m 0s
ubuntu-no-boost Release	23m 13s
ubuntu-no-unstable Debug	17m 58s
ubuntu-no-unstable Release	19m 20s
	5h 14m 7s

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