nodejs: fix cross compilation for non-emulatable platforms

This was tested x86_64-linux -> x86_64-freebsd. It works by injecting
the tools that would otherwise be run at build time for the same
executables extracted from a native build.

Without this, there are multiple issues:
a) It will fail to start building since there are naming conflicts
   between the "host" (build system) and "normal" (host system) object
   files. This is resolved with a patch from buildroot.
b) It will then still fail to build since it will still try to build the
   "host" objects, with a host compiler, but it will use the
   configuration flags for the "target" OS. This is resolved by
   importing the executables that would otherwise be run on the build
   system from the intermediate stage of a native build, saved in a new
   "dev" output. We also fake the "host" compiler as a tool which simply
   touches its outputs.
c) Finally, there is a clang bug which causes a static assert that
   something is trivially copyable to fire as a false positive. We
   remove this check with a patch from rubyjs.

0 files changed, 0 insertions, 0 deletions