Turn wasm-eh on by default

Author: hoodmane

compiler/rustc_session/src/options.rs

@@ -1818,7 +1818,7 @@ options! {
         "emit a section containing stack size metadata (default: no)"),
     emit_thin_lto: bool = (true, parse_bool, [TRACKED],
         "emit the bc module with thin LTO info (default: yes)"),
-    emscripten_wasm_eh: bool = (false, parse_bool, [TRACKED],
+    emscripten_wasm_eh: bool = (true, parse_bool, [TRACKED],
         "Use WebAssembly error handling for wasm32-unknown-emscripten"),
     enforce_type_length_limit: bool = (false, parse_bool, [TRACKED],
         "enforce the type length limit when monomorphizing instances in codegen"),