[ 18:17:07 marino ] pdnmeshcad Mesh generator and solver for Finite Element problems
cad/pdnmesh: Restore previous commit erased by r337036
tijl did a sweeping cleanup of pdnmesh on r337036, but he accidently
removed the addition of -lm introduced in r32377 by myself. This is
needed for newer gcc compilers using the latest binutils.
This commit restores the LDFLAGS still needed.