rewrite suspicious-library in rmake

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -246,7 +246,6 @@ run-make/static-pie/Makefile
 run-make/staticlib-blank-lib/Makefile
 run-make/staticlib-dylib-linkage/Makefile
 run-make/std-core-cycle/Makefile
-run-make/suspicious-library/Makefile
 run-make/symbol-mangling-hashed/Makefile
 run-make/symbol-visibility/Makefile
 run-make/symbols-include-type-name/Makefile

tests/run-make/suspicious-library/Makefile

@@ -0,0 +1,14 @@
+// This test creates some fake dynamic libraries with nothing inside,
+// and checks if rustc avoids them and successfully compiles as a result.
+
+//@ ignore-cross-compile
+
+use run_make_support::{dynamic_lib, rustc};
+use std::fs::File;
+
+fn main() {
+    rustc().input("foo.rs").arg("-Cprefer-dynamic").run();
+    File::create(dynamic_lib("foo-something-special")).unwrap();
+    File::create(dynamic_lib("foo-something-special2")).unwrap();
+    rustc().input("bar.rs");
+}