message: fix filamat unit tests
  We use TargetLanguage::SPIRV instead of GLSL which affects how the
  source GLSL is generated, in particular which version is used.
  This change is not a problem for these unit tests, but is probably
  exposing another problem -- we will address that separately.
diff: @@ -70,7 +70,7 @@ std::string shaderWithAllProperties(JobSystem& jobSystem, ShaderType type,
  builder.build(jobSystem);
  return builder.peek(type,
  - {1, MaterialBuilder::TargetApi::OPENGL, MaterialBuilder::TargetLanguage::GLSL},
  + { 1, MaterialBuilder::TargetApi::OPENGL, MaterialBuilder::TargetLanguage::SPIRV },
  allProperties);
  }
  