uninstalled headers from 'support' (gnome-libs)

[Junichi Saito <j saito wanadoo fr>]

Makefile.am in 'support' has the following line commented out 

 # gnome-argp.h getopt.h long-options.h argp.h error.h

and the build of libgtop afterwards fails at libgtop/src/daemon with:

  gnuserv.c:44: gnome-argp.h: No such file or directory

Last time(2nd Dec), they were all installed and there is no trace of the
change in support/Changelog.

junichi