Disable dylib variants of nostd bindgen modules

rust_bindgen modules now produce dylib variants. This needs to be
disabled for nostd bindgen modules unless a panic handler is
provided for the dylib variant.

Bug: 294698705
Test: m rust
Change-Id: Id88a09de53bd5e9b990953ef444a16ad25019416
diff --git a/libs/libfdt/Android.bp b/libs/libfdt/Android.bp
index 7dc9e64..b2e7b2b 100644
--- a/libs/libfdt/Android.bp
+++ b/libs/libfdt/Android.bp
@@ -16,6 +16,9 @@
         "--raw-line=#![no_std]",
         "--ctypes-prefix=core::ffi",
     ],
+    dylib: {
+        enabled: false,
+    },
     static_libs: [
         "libfdt",
     ],