tree 2dfd6c7d11507850d6968a24fe17c04d84da6205
parent b8854b6ea6f9d3a8eca60d6486ab807e4b7ef3b5
author James Robinson <jamesr@google.com> 1492816204 -0700
committer James Robinson <jamesr@google.com> 1492816206 -0700

Explicitly trigger rebuilds of all targets built for fuchsia when toolchain updates

This adds a define line with the toolchain version (from the stamp file
written out by jiri) to the compilation line for all targets built for
Fuchsia, so we always rebuild when the compiler or other parts of the
toolchain update. Today this is (mostly) redundant with the sysroot
stamp file, but since that is going away soon we need a mechanism to
trigger rebuilds for compiler changes that don't change headers or
libraries in the sysroot proper.

Change-Id: Icf9798002e7537b74dadc1bb9dff4da662e2201d