Enable gshared-mrgctx mode by default.

Author: vargaz

src/mono/mono/utils/options-def.h

@@ -161,7 +161,8 @@ DEFINE_INT(jiterpreter_table_size, "jiterpreter-table-size", 6 * 1024, "Size of
 DEFINE_INT(jiterpreter_aot_table_size, "jiterpreter-aot-table-size", 3 * 1024, "Size of the jiterpreter AOT trampoline function tables")
 #endif // HOST_BROWSER
 
-#if defined(TARGET_WASM) || defined(TARGET_IOS)  || defined(TARGET_TVOS) || defined (TARGET_MACCAT)
+//#if defined(TARGET_WASM) || defined(TARGET_IOS)  || defined(TARGET_TVOS) || defined (TARGET_MACCAT)
+#if 1
 DEFINE_BOOL_READONLY(experimental_gshared_mrgctx, "experimental-gshared-mrgctx", TRUE, "Use a mrgctx for all gshared methods")
 #else
 DEFINE_BOOL(experimental_gshared_mrgctx, "experimental-gshared-mrgctx", FALSE, "Use a mrgctx for all gshared methods")