Bazel build for android (execinfo.h is not supported)

[widiba03304]

Hi, folks.

I found this defines BACKTRACE_HEADER as execinfo.h, but Android NDK does not have it.

I could patch the source code to not use this by unsetting HAVE_BACKTRACE, but I feel this is not a perfect way to handle potential version updates.

Do you have any suggestions for my use case?