commit 04901554f0a36d73bd47e7afbd1106fa530a931f
author Jonas Larsson <ljonas@google.com> Tue Aug 14 15:06:59 2018 -0700
committer Jonas Larsson <ljonas@google.com> Tue Aug 21 18:13:17 2018 +0000
tree 9a19cf445146b2f47eb91749c3291c7cf4d20759
parent 052b376028263ccc5dec27bd61e14ed61f74897e

Also make olddefconfig after merging arch and board defconfig

We create a .config from the arch defconfig, then append
board/defconfig to it. If board/defconfig enables new options
that brings in new sub-options an interactive prompt is shown
when building. Example: Adding CONFIG_USB_SERIAL=m gives

*
* Restart config...
*
*
* USB Serial Converter support
*
USB Serial Converter support (USB_SERIAL) [M/n/y/?]

Two problems with this:
- Interacting with the build isn't very efficient
- The docker build isn't actually interactive, responses
  to stdin aren't piped through so one can't progress and
  such new options can't be enabled in board defconfig.

Making olddefconfig solves both issues by automatically picking
the default options for any new options made available in
board/defconfig.

Change-Id: Id69310f2af62e1e9036195ec216219f4f1e74fbd