hdf5_ep

[svn-r11754] Purpose:
Feature

Description:
bin/reconfigure now allows users to define the paths to the autotools on their
system.  bin/reconfigure also runs the trace script when it is invoked.

Solution:
The autotools are specified using environment variables: AUTOCONF, AUTOMAKE,
ACLOCAL, AUTOHEADER, and LIBTOOL_DIR.  See bin/reconfigure for the defaults.
The version of each of the autotools is checked before they are run, so
users can't invoke the wrong version of any autotool.
The trace script is run on all the .c files in the src directory when
reconfigure is invoked.  Ideally, bin/reconfigure should be run when any new
function is added to the library, but if the tracing information is out of
date the library will still work.
The trace script has also been modified to ignore the multi and stdio file
drivers (per Quincey's suggestion).

Platforms tested:
mir, shanti