Update configure to check for size of pthread_attr_t

git-svn-id: svn://orca.physics.unc.edu/OrcaRoot@9103 fd86f90f-2c0a-422a-b972-84106d8db31b
Ignore orcaroot_ipe_edelweiss

git-svn-id: svn://orca.physics.unc.edu/OrcaRoot@9104 fd86f90f-2c0a-422a-b972-84106d8db31b
Reenable ORSocketReader, and use

typedef struct { private char[asize];}

to handle pthread variables.  This ensures similar
alignment, which was not happening before.

git-svn-id: svn://orca.physics.unc.edu/OrcaRoot@9105 fd86f90f-2c0a-422a-b972-84106d8db31b