Explicitly set the total amount of local host RAM (in MB) available to
Bazel to spend on build actions executed locally. Takes an integer, or
"HOST_RAM", optionally followed by [-|*]<float> (eg. HOST_RAM*.5 to use
half the available RAM). By default, ("HOST_RAM*.67"), Bazel will query
system configuration to estimate the amount of RAM available and will use
67% of it.