Add libpcap.make and tcpdump.make for tcpdump command/target

[abhisit]

How did I test this Pull Request?

1. Add the configurations to the machine name accton_as4630

   
   opencomputeproject-onie$ git diff
   diff --git a/machine/accton/accton_as4630/machine.make b/machine/accton/accton_as4630/machine.make
   index 4294ae97..5031ff02 100644
   --- a/machine/accton/accton_as4630/machine.make
   +++ b/machine/accton/accton_as4630/machine.make
   @@ -28,6 +28,9 @@ SKIP_ETHMGMT_MACS = yes
   UEFI_ENABLE = yes
   PXE_EFI64_ENABLE = yes

+LIBPCAP_ENABLE = yes +TCPDUMP_ENABLE = yes +

Console parameters

CONSOLE_DEV = 0

2. Make an image

$ cd build-config $ make JOBS= MACHINEROOT=../machine/accton MACHINE=accton_as4630 all

3. List the output files

opencomputeproject-onie$ ls -1 build/accton_as4630-r0/sysroot/usr/lib/libpcap libpcap.so libpcap.so.1 libpcap.so.1.10.4 opencomputeproject-onie$ ls -1 build/accton_as4630-r0/sysroot/usr/bin/tcpdump tcpdump

[mshych]

Thank you for commit and adding a new tool to ONIE. Pushed to master and tarballs added to ONIE mirror.