Change aot mode to normal aot with LLVM JIT fall back (#1990)

Author: fanyang-mono

src/BenchmarkDotNet/Extensions/ProcessExtensions.cs

@@ -137,7 +137,7 @@ internal static void SetEnvironmentVariables(this ProcessStartInfo start, Benchm
 
                 if (aotruntime.AOTCompilerMode == MonoAotCompilerMode.llvm)
                 {
-                    start.EnvironmentVariables["MONO_ENV_OPTIONS"] = "--full-aot";
+                    start.EnvironmentVariables["MONO_ENV_OPTIONS"] = "--llvm";
                 }
             }
 

src/BenchmarkDotNet/Templates/MonoAOTLLVMCsProj.txt

@@ -47,15 +47,14 @@
 
    <ItemGroup>
      <AotInputAssemblies Include="$(PublishDirFullPath)\*.dll">
-        <AotArguments>@(MonoAOTCompilerDefaultAotArguments, ';');mcpu=native</AotArguments>
-        <ProcessArguments>@(MonoAOTCompilerDefaultProcessArguments, ';')</ProcessArguments>
+        <AotArguments>mcpu=native</AotArguments>
      </AotInputAssemblies>
    </ItemGroup>
 
 
    <MonoAOTCompiler
         CompilerBinaryPath="$COMPILERBINARYPATH$"
-        Mode="Full"
+        Mode="Normal"
         OutputType="Library"
         LibraryFormat="$(SharedLibraryType)"
         Assemblies="@(AotInputAssemblies)"