version: update to 20180702
version: update to 20180702

This is aimed to go to QEMU v3.0.

Compared to 20180621, this fixes a couple issues related to gcc8.1.

Signed-off-by: Alexey Kardashevskiy <ac1fc56530d7d037e1ea666f130daca22d72f964@ozlabs.ru>

qemu/SLOF,stefanberger/SLOF-tpm,stefanberger/SLOF-tpm,aik/SLOF,aik/SLOF,aik/SLOF,qemu/SLOF,stefanberger/SLOF-tpm,qemu/SLOF