run crashes before corpus when running cargo test

This makes cargo test likely to crash faster than the other way around,
which in turn leads to faster iteration rate

This is a small improvement compared to camshaft#114, but always worth it even
if camshaft#114 were to land

bolero/src/test/mod.rs

@@ -87,11 +87,11 @@ impl TestEngine {
 
     fn tests(&self) -> Vec<NamedTest> {
         empty()
-            .chain(self.file_tests(["corpus"].iter().cloned()))
             .chain(self.file_tests(["crashes"].iter().cloned()))
+            .chain(self.file_tests(["afl_state", "crashes"].iter().cloned()))
             .chain(self.file_tests(["afl_state", "hangs"].iter().cloned()))
+            .chain(self.file_tests(["corpus"].iter().cloned()))
             .chain(self.file_tests(["afl_state", "queue"].iter().cloned()))
-            .chain(self.file_tests(["afl_state", "crashes"].iter().cloned()))
             .chain(self.rng_tests())
             .collect()
     }