hdf5_msb

[svn-r15112] Purpose: Bug fix

Description: While '-Wl,-rpath' information was being removed from compile
             lines when using --disable-sharedlib-rpath, some information
             was still hidden in another variable tht never got reset and
             thus snuck into the executables. This fix should take care of
             that issue.

Tested: kagiso, smirom