Rename the isle crate to cranelift-isle

The `isle` crate name is already taken on crates.io :(

Cargo.lock

@@ -539,10 +539,10 @@ dependencies = [
  "cranelift-codegen-meta",
  "cranelift-codegen-shared",
  "cranelift-entity",
+ "cranelift-isle",
  "criterion",
  "gimli",
  "hashbrown",
- "isle",
  "log",
  "miette",
  "regalloc",
@@ -625,6 +625,15 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "cranelift-isle"
+version = "0.78.0"
+dependencies = [
+ "log",
+ "miette",
+ "thiserror",
+]
+
 [[package]]
 name = "cranelift-jit"
 version = "0.78.0"
@@ -1420,21 +1429,12 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "616cde7c720bb2bb5824a224687d8f77bfd38922027f01d825cd7453be5099fb"
 
-[[package]]
-name = "isle"
-version = "0.78.0"
-dependencies = [
- "log",
- "miette",
- "thiserror",
-]
-
 [[package]]
 name = "isle-fuzz"
 version = "0.0.0"
 dependencies = [
+ "cranelift-isle",
  "env_logger 0.9.0",
- "isle",
  "libfuzzer-sys",
  "log",
 ]
@@ -1443,8 +1443,8 @@ dependencies = [
 name = "islec"
 version = "0.1.0"
 dependencies = [
+ "cranelift-isle",
  "env_logger 0.8.3",
- "isle",
  "miette",
  "structopt",
 ]