Fix directives for lint-non-snake-case-crate

This test fails on targets without unwinding because the proc macro was
compiled as the target, not the host. Some targets were explicitly
disabled to pass CI, but these directives are more general.

Fixes Fuchsia tests.

Author: tmandry

tests/ui/lint/non-snake-case/lint-non-snake-case-crate.rs

@@ -10,10 +10,12 @@
 
 // But should fire on non-binary crates.
 
-//@[cdylib_] ignore-musl (dylibs are not supported)
-//@[dylib_] ignore-musl (dylibs are not supported)
-//@[dylib_] ignore-wasm (dylib is not supported)
-//@[proc_macro_] ignore-wasm (dylib is not supported)
+//@[cdylib_] needs-dynamic-linking
+//@[dylib_] needs-dynamic-linking
+// FIXME: dylib crate type is not supported on wasm; we need a proper supports-crate-type directive
+//@[dylib_] ignore-wasm
+//@[proc_macro_] force-host
+//@[proc_macro_] no-prefer-dynamic
 
 //@[cdylib_] compile-flags: --crate-type=cdylib
 //@[dylib_] compile-flags: --crate-type=dylib