hdf5_ep

[svn-r3804] Purpose:
    Bug Fix
Description:
    If we need to specify a -R flag for dynamic libraries (like, in the
    case when we specify --with-hdf4), then this flag needs to be added
    to the linking line so that it will show up in the generated library
    and other programs linking to that library will be able to find the
    relevant libraries.
Solution:
    Added the DYNAMIC_DIRS macro to the link line.
Platforms tested:
    Arabica