lipo命令创建或者是操作一个通用文件，转变通用文件为单独的架构文件或者反过来转变单独架构文件为通用文件。
usage: lipo <input_file> <command> [<options> ...]
command is one of:
-archs
-create
-detailed_info
-extract <arch_type> [-extract <arch_type> ...]
-extract_family <arch_type> [-extract_family <arch_type> ...]
-info
-remove <arch_type> [-remove <arch_type> ...]
-replace <arch_type> <file_name> [-replace <arch_type> <file_name> ...]
-thin <arch_type>
-verify_arch <arch_type> ...
options are one or more of:
-arch <arch_type> <input_file>
-hideARM64
-output <output_file>
-segalign <arch_type> <alignment>
remove
lipo xxx.framework/xxx -remove arm64 -output xxx.framework/xxx
create
lipo -create iphoneos/xxx.framework/xxx iphonesimulator/xxx.framework/xxx -output all/xxx.framework/xxx
