split version script into multiple files

split version script into multiple files

* src/Makefile.am (PRIVSYMFILES): Define.
(EXTRA_DIST): Append $(PRIVSYMFILES).
(libvirt.syms): New rule.
Reflect renaming: s/libvirt_sym.version/libvirt.syms/.
(BUILT_SOURCES): Depend on libvirt.syms.
* configure.in: Define ENABLE_DEBUG as an automake conditional.
(AC_OUTPUT): Remove src/libvirt_sym.version.
* src/.cvsignore: s/libvirt_sym.version/libvirt.syms/.
* src/.gitignore: Regenerate.
* src/libvirt_public.syms: Renamed from src/libvirt_sym.version.in.
* src/libvirt_debug.syms: New file.
* src/libvirt_private.syms: New file.
Author: John Levon