vchoi_fork

[svn-r10730] Purpose:
Portability feature

Description:
The random() and srandom() functions are not available on all machines.
Set up the configure script to automatically detect them, rather than
requiring their presence or absence to be hardcoded.

Solution:
Added AC_CHECK_FUNCS macro to configure.in and replaced
#ifdef WIN32 conditionals with #ifdef H5_HAVE_RANDOM conditionals.

Platforms tested:
sleipnir, Windows