Clang hangs while building third_party/angle/third_party/vulkan-validation-layers with symbol_level = 2. Changing symbol_level to 1 is a workaround that allows the build to complete.

My complete gn args are:
use_goma = true
is_debug = false
symbol_level = 2
print_unsymbolized_stack_traces = true
is_component_build = true
dcheck_always_on = true
enable_nacl = false