swr: relax c++ requirement from c++14 to c++11

Remove c++14 generic lambda to keep compiler requirement at c++11.

No regressions on piglit or vtk test suites.

Tested-by: Chuck Atkins <chuck.atkins@kitware.com>
Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

CC: mesa-stable@lists.freedesktop.org
4 files changed