Force the creation of libs instead of dylibs on CloudABI.

CloudABI doesn't support the creation of dynamic libraries. Any test
making use of auxiliary libraries will fail without this change applied.

Author: EdSchouten

src/tools/compiletest/src/runtest.rs

@@ -1368,9 +1368,10 @@ impl<'test> TestCx<'test> {
 
             let crate_type = if aux_props.no_prefer_dynamic {
                 None
-            } else if (self.config.target.contains("musl") && !aux_props.force_host)
-                || self.config.target.contains("wasm32")
+            } else if self.config.target.contains("cloudabi")
                 || self.config.target.contains("emscripten")
+                || (self.config.target.contains("musl") && !aux_props.force_host)
+                || self.config.target.contains("wasm32")
             {
                 // We primarily compile all auxiliary libraries as dynamic libraries
                 // to avoid code size bloat and large binaries as much as possible