[master] Add ChangeLog entry for #3213

ChangeLog

+800.	[build]		jinmei
+	Fixed various build time issues for MacOS X 10.9.  Those include
+	some general fixes and improvements:
+	- (libdns++) masterLoad() functions now use the generic MasterLoader
+	  class as backend, eliminating the restrictions of the previous
+	  versions.
+	- (libcc) fixed a minor portability bug in the JSON parser.  Although
+	  the only known affected system is OS X 10.9 at the moment, that
+	  could potentially cause disruption on other existing and future
+	  systems.
+	Other notes:
+	- if built with googletest, gtest 1.7 (and possibly higher) is
+	  required.
+	- many older versions of Boost don't work.  A known workable version
+	  is 1.54.
+	(Trac #3213, git d4e570f097fe0eb9009b177a4af285cde0c636cc)
+
 709.	[bug]		marcin
 	b10-dhcp6: Server crashed when the client sent FQDN option and did
 	not request FQDN option to be returned.