Improve build time for build scripts in release mode

Author: bjorn3

Cargo.toml

@@ -60,11 +60,22 @@ opt-level = 0
 opt-level = 0
 debug = false
 
+[profile.release.build-override]
+opt-level = 0
+debug = false
+
 [profile.dev.package.cranelift-codegen-meta]
 opt-level = 0
 debug = false
 
+[profile.release.package.cranelift-codegen-meta]
+opt-level = 0
+debug = false
+
 [profile.dev.package.syn]
 opt-level = 0
 debug = false
 
+[profile.release.package.syn]
+opt-level = 0
+debug = false