Merge pull request #7 from MarshalX/fix-pdep-speed-return-type

Fix pdep_speed return type for non x86 arch

build.rs

@@ -50,7 +50,7 @@ fn pdep_speed() -> PdepPerf {
 }
 
 #[cfg(not(any(target_arch = "x86_64", target_arch = "x86")))]
-fn pdep_speed() -> bool {
+fn pdep_speed() -> PdepPerf {
     PdepPerf::Slow
 }