Deactivate crash test on GCC backend.

Author: cjgillot

tests/crashes/project-to-simd-array-field.rs

@@ -1,5 +1,7 @@
 //@ known-bug: #137108
-//@compile-flags: -Copt-level=3
+//@ compile-flags: -Copt-level=3
+// This test only ICEs on LLVM-based codegen.
+//@ needs-llvm-components
 
 // If you fix this, put it in the corresponding codegen test,
 // not in a UI test like the readme says.