Remove compiler flag LIBYUV_NEON from iOS release build

drivers/theoraplayer/SCsub

@@ -67,7 +67,7 @@ if env["platform"] == "iphone":
 	sources.append("src/AVFoundation/TheoraVideoClip_AVFoundation.mm")
 	env.Append(LINKFLAGS=['-framework', 'CoreVideo', '-framework', 'CoreMedia', '-framework', 'AVFoundation'])
 	if env["target"] == "release":
-		env_theora.Append(CPPFLAGS=["-D_IOS", "-D__ARM_NEON__", "-DLIBYUV_NEON", "-fstrict-aliasing", "-fmessage-length=210", "-fdiagnostics-show-note-include-stack", "-fmacro-backtrace-limit=0", "-fcolor-diagnostics", "-Wno-trigraphs", "-fpascal-strings", "-fvisibility=hidden", "-fvisibility-inlines-hidden"])
+		env_theora.Append(CPPFLAGS=["-D_IOS", "-D__ARM_NEON__", "-fstrict-aliasing", "-fmessage-length=210", "-fdiagnostics-show-note-include-stack", "-fmacro-backtrace-limit=0", "-fcolor-diagnostics", "-Wno-trigraphs", "-fpascal-strings", "-fvisibility=hidden", "-fvisibility-inlines-hidden"])
 
 env_theora.Append(CPPFLAGS=["-D_LIB", "-D__THEORA"]) # removed -D_YUV_C
 env_theora.Append(CPPFLAGS=["-D_YUV_LIBYUV"])