Add test of C++ HDF5 interface.
Add test of C++ HDF5 interface.

If this is present, we should be sure we can link against it.
Therefore, use an AC_LINK_IFELSE test.  Note also that HDF5 programs
need to link against both -lhdf5 and -lhdf5_cpp in order to work.

Refs #910.

giorgiobornia/libmesh,capitalaslash/libmesh,pbauman/libmesh,jwpeterson/libmesh,balborian/libmesh,aeslaughter/libmesh,svallaghe/libmesh,jwpeterson/libmesh,friedmud/libmesh,BalticPinguin/libmesh,svallaghe/libmesh,90jrong/libmesh,balborian/libmesh,hrittich/libmesh,coreymbryant/libmesh,benkirk/libmesh,balborian/libmesh,BalticPinguin/libmesh,giorgiobornia/libmesh,BalticPinguin/libmesh,balborian/libmesh,svallaghe/libmesh,vikramvgarg/libmesh,svallaghe/libmesh,libMesh/libmesh,vikramvgarg/libmesh,90jrong/libmesh,balborian/libmesh,coreymbryant/libmesh,dschwen/libmesh,aeslaughter/libmesh,libMesh/libmesh,dschwen/libmesh,90jrong/libmesh,vikramvgarg/libmesh,vikramvgarg/libmesh,dschwen/libmesh,jwpeterson/libmesh,giorgiobornia/libmesh,90jrong/libmesh,svallaghe/libmesh,pbauman/libmesh,benkirk/libmesh,hrittich/libmesh,coreymbryant/libmesh,90jrong/libmesh,pbauman/libmesh,jwpeterson/libmesh,pbauman/libmesh,roystgnr/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,balborian/libmesh,benkirk/libmesh,coreymbryant/libmesh,friedmud/libmesh,90jrong/libmesh,friedmud/libmesh,jwpeterson/libmesh,pbauman/libmesh,capitalaslash/libmesh,libMesh/libmesh,benkirk/libmesh,coreymbryant/libmesh,svallaghe/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,friedmud/libmesh,balborian/libmesh,jwpeterson/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,giorgiobornia/libmesh,giorgiobornia/libmesh,aeslaughter/libmesh,giorgiobornia/libmesh,hrittich/libmesh,dschwen/libmesh,aeslaughter/libmesh,roystgnr/libmesh,roystgnr/libmesh,dschwen/libmesh,90jrong/libmesh,roystgnr/libmesh,benkirk/libmesh,aeslaughter/libmesh,benkirk/libmesh,dschwen/libmesh,friedmud/libmesh,BalticPinguin/libmesh,hrittich/libmesh,pbauman/libmesh,vikramvgarg/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,aeslaughter/libmesh,benkirk/libmesh,benkirk/libmesh,friedmud/libmesh,aeslaughter/libmesh,hrittich/libmesh,coreymbryant/libmesh,balborian/libmesh,coreymbryant/libmesh,90jrong/libmesh,pbauman/libmesh,hrittich/libmesh,hrittich/libmesh,vikramvgarg/libmesh,coreymbryant/libmesh,dschwen/libmesh,roystgnr/libmesh,capitalaslash/libmesh,pbauman/libmesh,pbauman/libmesh,libMesh/libmesh,vikramvgarg/libmesh,vikramvgarg/libmesh,balborian/libmesh,balborian/libmesh,roystgnr/libmesh,friedmud/libmesh,svallaghe/libmesh,libMesh/libmesh,libMesh/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,aeslaughter/libmesh,giorgiobornia/libmesh,libMesh/libmesh,vikramvgarg/libmesh,libMesh/libmesh,roystgnr/libmesh,svallaghe/libmesh,friedmud/libmesh,dschwen/libmesh,hrittich/libmesh,BalticPinguin/libmesh,hrittich/libmesh,aeslaughter/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,friedmud/libmesh,svallaghe/libmesh,90jrong/libmesh,jwpeterson/libmesh,benkirk/libmesh