vchoi_fork

[svn-r17639] Purpose:

    Configure Fix

Description:

    uP (AIX Machine) was failing because configure needs to see -k flag in
    FCFLAGS for some checks to behave as intended. Since the config files
    were switched to passing all flags into H5_FCCFLAGS, this broke this
    behavior.

    To allow configure to see this again, FCFLAGS and all other user flags
    are saved before doing anything, and restored at the end of configure,
    so if needed we can set these values in configure and/or the config/ 
    files without (permanently) overriding or changing anything a user sets.

    Also modified the powerpc-ibm-aix5.x config file to once again put -k
    into FCFLAGS in addition to H5_FCFLAGS (the former of which will be
    restored after configure completes the checks).

Tested:

    h5committest (jam and amani finished, linew still running, though
    I wanted to get this in for daily tests since it needs to be run on
    uP for final verification).