Otherwise they'll fall back to the GOROOT embedded in the distribution,
which may not be correct.
This used to be propagated through build.ninja.in, but exporting it in
the environment should catch any other Go users too.
Change-Id: I3d6de8494b266e9b127c0a528d31df03ddc5c3a0
Blueprint is a meta-build system that reads in Blueprints files that describe
modules that need to be built, and produces a
Ninja manifest describing the commands that
need to be run and their dependencies. Where most build systems use built-in
rules or a domain-specific language to describe the logic for converting module
descriptions to build rules, Blueprint delegates this to per-project build
logic written in Go. For large, heterogenous projects this allows the inherent
complexity of the build logic to be maintained in a high-level language, while
still allowing simple changes to individual modules by modifying easy to
understand Blueprints files.
91ec9f4b7a
