Since we bumped the NDK in dotnet/dotnet-buildtools-prereqs-docker#1278, libClang.so is no longer found in the place we expect. As a result, the android aot offsets won't be generated and the dedicated CI leg will fail.

This change fixes the path.

Author: steveisok

src/mono/mono.proj

@@ -688,7 +688,9 @@
 
     <!-- Linux specific options -->
     <ItemGroup Condition="'$(AotHostOS)' == 'linux'">
-      <_LibClang Include="$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib64/libclang.so.*"/>
+      <_LibClang Include="$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib/libclang.so" Condition=" Exists('$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib/libclang.so') "/>
+      <_LibClang Include="$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/lib64/libclang.so.*" Condition=" '@(_LibClang)' == '' "/>
+      <_LibClang Include="/usr/local/lib/libclang.so" Condition="'@(_LibClang)' == ''" />
     </ItemGroup>
     <PropertyGroup Condition="'$(TargetsLinux)' == 'true' and '$(Platform)' == 'arm64'">
       <MonoUseCrossTool>true</MonoUseCrossTool>