vchoi_fork

[svn-r6711] Purpose:
Bug fix

Description:
Sometimes when H5detect fails (incorrect code, incorrect mpi launch
command, insufficient resources,...), it generates an incomplete or
even empty H5Tinit.c file.  If the empty file is not removed but
the make is run again, make will just use the empty file to generate
the library which will have lots of missing routines.  Make won't
fail until much later and the missing routines would be puzzling
to inexperienced users.

Solution:
If H5detect fails, the generated H5Tinit.c will be removed unless
$HDF5_Make_Ignore is set.  This is similar to removing .o file if
the compile fails.

Platforms tested:
Copper (parallel) which has a condition causing H5detect to fail.
That verified the change works.
Eirene (parallel) in which H5detect runs well.  This verified the
change works in normal conditions too.
Did not do the h5committest because this is just a makefile change
and the above two tests covered it well.

Misc. update: