tier0: fix cpu freq on some arm cpu's

tier0/cpu_posix.cpp

@@ -180,6 +180,6 @@ uint64 CalculateCPUFreq()
 
 	return period;
 #endif
-	return (uint64)0;
+	return (uint64)2000000000;
 }
 

wscript

@@ -271,12 +271,9 @@ def configure(conf):
 	if conf.options.OPUS or conf.env.DEST_OS == 'android':
 		projects['game'] += ['engine/voice_codecs/opus']
 
-	if conf.env.DEST_OS in ['win32', 'linux', 'darwin'] and conf.env.DEST_CPU in ['x86_64', 'amd64']:
 	conf.env.BIT32_MANDATORY = not conf.options.ALLOW64
 	if conf.env.BIT32_MANDATORY:
 		Logs.info('WARNING: will build engine for 32-bit target')
-	else:
-		conf.env.BIT32_MANDATORY = False
 
 	conf.load('force_32bit')