DAILYTEST-31: Fix cmakehdf5 for Daily Test use
Fix cmakehdf5 so that it can figure out where the source directory is.
It expects cmakehdf5 itself resides at $srcdir/bin/cmamkehdf5.

Tested: Jam by invoking cmakehdf4 with different paths.


git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@25876 dab4d1a6-ed17-0410-a064-d1ae371a2980