tests: Rename to avoid colliding with real rust-zmq.

src/test/auxiliary/issue-2526.rs

@@ -1,4 +1,4 @@
-#[link(name = "zmq",
+#[link(name = "issue_2526",
        vers = "0.2",
        uuid = "54cc1bc9-02b8-447c-a227-75ebc923bc29")];
 #[crate_type = "lib"];

src/test/run-pass/issue-2526-a.rs

@@ -1,8 +1,8 @@
 // xfail-fast
 // aux-build:issue-2526.rs
 
-use zmq;
-import zmq::*;
+use issue_2526;
+import issue_2526::*;
 
 fn main() {}