Fix build error.

Fixes rsyslog.c:62:31: error: liblogging/stdlog.h: No such file or directory
undo unnecessary change (libs are not needed)
prepare for 7.6.4
Merge branch 'v7-stable' into v8-stable
Merge branch 'v7-stable' into v8-stable

Conflicts:
	ChangeLog
	configure.ac
define a macro missing on some very few platforms
Merge branch 'v7-stable' of git+ssh://git.adiscon.com/git/rsyslog into v7-stable
Merge branch 'v7-stable'
Merge branch 'v8-stable'

Conflicts:
	runtime/Makefile.am