tcmalloc rust bindings

[jayakasadev]

Added tcmalloc_rs which generates necessary rust bindings and surfaces a lib for rust users to adopt tcmalloc.

[0xdeafbeef]

all you need is to add this rule to the root build.

cc_static_library(
    name = "tcmalloc_fat",
    deps = [
        "//tcmalloc:tcmalloc",
    ],
    visibility = ["//visibility:public"]
)

than

./bazelisk-linux-amd64 build //tcmalloc:tcmalloc_fat --features=-disallow_absolute_includes_from_system_paths --experimental_cc_static_library

also better to build it using only cc without pulling bazel

[maratik123]

also better to build it using only cc without pulling bazel

I've made attempt to build rust wrapper for tcmalloc without bazel:
https://github.com/maratik123/tcmalloc-better/