flex: revert change to the handling of the latest flex version
It causes problems on recent GNU/Linux distributions
fvPatchFields: Correct handling of deltaCoeffs in snGrad/laplacian for non-orthogonal coupled patches
Resolves bug-report: http://www.openfoam.org/mantisbt/view.php?id=747
Merge branch 'master' of github.com:OpenFOAM/OpenFOAM-2.2.x