Add rerun_except to root crate

Cargo is finding more reasons to do unnecessary rebuilds, so I've added
the rerun_except crate to its build.rs as well to ignore .asm files
before recompiling.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

Cargo.lock

@@ -532,6 +532,7 @@ name = "rasp"
 version = "0.1.0"
 dependencies = [
  "libvm 0.1.0",
+ "rerun_except 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "snafu 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "structopt 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

Cargo.toml

@@ -10,3 +10,6 @@ edition = "2018"
 structopt = "0.3"
 snafu = "0.6.2"
 libvm = { path = "src/libvm" }
+
+[build-dependencies]
+rerun_except = "0.1"

build.rs

@@ -0,0 +1,7 @@
+use rerun_except::rerun_except;
+
+fn main() {
+    rerun_except(&[
+        "*.asm",
+    ]).unwrap();
+}