lipo -info libJMALibrary.a
Architectures in the fat file: libJMALibrary.a are: i386 armv7
lipo命名只能识别armv7和之前的架构，对于armv7s不能识别
xcrun -sdk iphoneos lipo -info libJMALibrary.a
Architectures in the fat file: libJMALibrary.a are: i386 armv7 armv7s
xcrun -sdk iphoneos lipo可以解决armv7s及之后的识别问题
