Use some 4.2.2_r1.2 projects

external/ipsec-tools
external/iptables
prebuilts/gcc/linux-x86/host/i686-linux-glibc2.7-4.6
prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.7-4.6
prebuilts/tools (my own)

Change-Id: I019172ec228f31bd6fd8690d9b709fddcdb8c37a