Includes only what's necessary for boost::stacktrace.
See third_party/boost/README.md for instructions on how create/update
this minimal boost version.

Bug: b/131425026
Change-Id: I61643a0ba09d8b27517ec94f88c31d3a5aef09f4
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/30008Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>