revive llvm builder utility (#154)

Pre-eliminary support for LLVM releases and resolc binary releases by streamlining the build process for all supported hosts platforms.

- Introduce the revive-llvm-builder crate with the revive-llvm builder utilty.
- Do not rely on the LLVM dependency in $PATH to decouple the system LLVM installation from the LLVM host dependency.
- Fix the emscripten build by decoupling the host and native LLVM dependencies. Thus allowing a single LLVM emscripten release that can be used on any host platform.
- An example Dockerfile building an alpine container with a fully statically linked resolc ELF binary.
- Remove the Debian builder utilities and workflow.

Cargo.toml

@@ -26,6 +26,7 @@ revive-runtime-api = { version = "0.1.0-dev.7", path = "crates/runtime-api" }
 revive-runner = { version = "0.1.0-dev.7", path = "crates/runner" }
 revive-solidity = { version = "0.1.0-dev.7", path = "crates/solidity" }
 revive-stdlib = { version = "0.1.0-dev.7", path = "crates/stdlib" }
+revive-build-utils = { version = "0.1.0-dev.7", path = "crates/build-utils" }
 
 hex = "0.4"
 petgraph = "0.6"
@@ -63,7 +64,16 @@ env_logger = { version = "0.10.0", default-features = false }
 serde_stacker = "0.1"
 criterion = { version = "0.5", features = ["html_reports"] }
 log = { version = "0.4" }
-git2 = "0.19.0"
+git2 = { version = "0.19.0", default-features = false }
+downloader = "0.2.8"
+flate2 = "1.0.35"
+http = "1.2.0"
+fs_extra = "1.3.0"
+num_cpus = "1"
+tar = "0.4.4"
+toml = "0.8"
+assert_cmd = "2.0.16"
+assert_fs = "1.1.2"
 
 # polkadot-sdk and friends
 codec = { version = "3.6.12", default-features = false, package = "parity-scale-codec" }