Build tcpdump for ARM

http://wiki.neurostechnology.com/index.php/Cross_Compiling_on_Linux

http://androidap.blogspot.com/2010/11/tcpdump-for-android.html

http://hi.baidu.com/shangyefeng/item/576ae12c4670c30842634a87

http://blog.csdn.net/jgf_ntu/article/details/8607575