BUILDBOT: Disable MADS engine for OSX PPC builds to fix build.

The root cause of this problem needs locating and a longterm fix
or mitigation (Dynamic Plugins?) is required as each new engine or
increase in code size retriggers this issue.

config/master.cfg

@@ -515,6 +515,7 @@ p = {
 	"configureargs": [
 		"--host=ppc-apple-darwin8",
 		"--disable-freetype2", # 2014-04-18 Linking fails at packaging for nightly builds if Freetype library is enabled with errors of type "relocation overflow for relocation entry XX in section (__TEXT,__textcoal_nt) (displacement too large)"
+		"--disable-engines=mads", # 2014-05-26 Linking fails at packaging with similar error - FIXME: Need better solution longterm
 		"--with-staticlib-prefix=%s" % scumm_root_osx_ppc
 	],
 	"configureargs-tools": [