Allowed overwriting AsOptions

Author: jkurdek

src/mono/msbuild/android/build/AndroidBuild.targets

@@ -133,6 +133,7 @@
     </PropertyGroup>
 
     <PropertyGroup>
+      <_AsOptions>-target $(_Triple) -c -x assembler</_AsOptions>
       <_LdName>clang</_LdName>
       <_LdOptions>-fuse-ld=lld</_LdOptions>
       <_AsName>clang</_AsName>
@@ -230,7 +231,7 @@
     <MonoAOTCompiler
         AotModulesTablePath="$(_AotModuleTablePath)"
         AsName="$(_AsName)"
-        AsOptions="-target $(_Triple) -c -x assembler"
+        AsOptions="$(_AsOptions)"
         Assemblies="@(_AotInputAssemblies)"
         CompilerBinaryPath="$(_CompilerBinaryPath)"
         DirectPInvokes="@(DirectPInvokes)"

src/mono/sample/Android/AndroidSampleApp.csproj

@@ -83,6 +83,7 @@
     </PropertyGroup>
 
     <PropertyGroup>
+      <_AsOptions>-target $(_Triple) -c -x assembler</_AsOptions>
       <_LdName>clang</_LdName>
       <_LdOptions>-fuse-ld=lld</_LdOptions>
       <_AsName>clang</_AsName>
@@ -91,7 +92,7 @@
     <MonoAOTCompiler Condition="'$(ForceAOT)' == 'true'"
         AotModulesTablePath="$(_AotModulesTablePath)"
         AsName="$(_AsName)"
-        AsOptions="-target $(_Triple) -c -x assembler"
+        AsOptions="$(_AsOptions)"
         Assemblies="@(AotInputAssemblies)"
         CompilerBinaryPath="@(MonoAotCrossCompiler->WithMetadataValue('RuntimeIdentifier','$(TargetOS)-$(TargetArchitecture.ToLowerInvariant())'))"
         IntermediateOutputPath="$(IntermediateOutputPath)"