Update CCTexture2D.m

- (CGSize)drawInRect:(CGRect)rect withFont:(UIFont *)font lineBreakMode:(NSLineBreakMode)lineBreakMode alignment:(NSTextAlignment)alignment is deprecated since 7.0, 
Since 7.1, the aligment of CCLabelTTF is broken, if the phone language has a right to left alignement. (eg Hebrew)

https://github.com/cocos2d/cocos2d-iphone/issues/653#issuecomment-37854439