hdf5_ep

[svn-r13645] Purpouse:
Bug fix (851)

Description:
h5vers calls bin/reconfigure which may fail but h5vers does not
check its return value. This will result in discrepency between
files such as configure and configure.in.

Solution:
Fixed it by checking exit code of bin/reconfigure and return error if
it fails.

Tested:
osage and kagiso.