Add license to cpu-cycles matching libcpucycles

Author: octol

cpu-cycles/Cargo.toml

@@ -4,9 +4,10 @@ version = "0.1.0"
 edition = "2021"
 build = "build.rs"
 links = "cpucycles"
+license = "LicenseRef-PD-hp OR CC0-1.0 OR 0BSD OR MIT-0 OR MIT"
 
 [dependencies]
 libc = "0.2.140"
 
 [build-dependencies]
-cfg-if = "1"
+cfg-if = "1"