Merge pull request #154 from foniod/llvm-sys-12

Bump LLVM version to 12

Author: rsdy

cargo-bpf/Cargo.toml

@@ -27,7 +27,7 @@ futures = { version = "0.3", optional = true }
 tokio = { version = "^1.0.1", features = ["rt", "macros", "signal"], optional = true }
 hexdump = { version = "0.1", optional = true }
 libc = {version = "0.2.66", optional = true}
-llvm-sys = { version = "110", optional = true}
+llvm-sys = { version = "120", optional = true}
 syn = { version = "1.0", features = ["full", "visit"], optional = true }
 quote = { version = "1.0", optional = true }
 proc-macro2 = {version = "1.0", optional = true}