Add SuiteSparse::IsConstrainedApproximateMinimumDegreeOrderingAvailable.
Add SuiteSparse::IsConstrainedApproximateMinimumDegreeOrderingAvailable.

This allows checking for the availability of CAMD without depending
on a preprocessor symbol, which can be the source of subtle bugs
if the file defining that symbol was not included.

Change-Id: I6f1ef91a20baeecf68e8dd467ebe707dde8c5f79

entylop/ceres-solver,DougFirErickson/ceres-solver,stonier/ceres_solver,kartikkumar/ceres-solver,entylop/ceres-solver,entylop/ceres-solver,timfel/ceres-bin,timfel/ceres-bin,DougFirErickson/ceres-solver,kartikkumar/ceres-solver,stonier/ceres_solver,ysonggit/ceres-solver,whuaegeanse/ceres-solver,stonier/ceres_solver,stonier/ceres_solver,entylop/ceres-solver,whuaegeanse/ceres-solver,whuaegeanse/ceres-solver,DougFirErickson/ceres-solver,whuaegeanse/ceres-solver,timfel/ceres-bin,kartikkumar/ceres-solver,ysonggit/ceres-solver,ysonggit/ceres-solver,DougFirErickson/ceres-solver,kartikkumar/ceres-solver,timfel/ceres-bin,ysonggit/ceres-solver