fix(verilator): add verilatedos includes to Bazel build file

[MrAMS]

fix(verilator): Add verilatedos.h includes to Bazel build for C++ library

The Bazel build for the Verilated C++ library was failing to compile verilator_cc_library rules due to missing dependency declarations for verilatedos.h. Specifically, the following error occurred:

Compiling hdl/chisel/src/demo/counter_cc_library_cc_cpp/VCounter___024root__DepSet_hd4904501__0.cpp failed: undeclared inclusion(s) in rule '//hdl/chisel/src/demo:counter_cc_library_cc':

this rule is missing dependency declarations for the following files included by 'hdl/chisel/src/demo/counter_cc_library_cc_cpp/VCounter___024root__DepSet_hd4904501__0.cpp':

  'bazel-out/k8-fastbuild/bin/external/verilator/_virtual_includes/verilator/verilatedos.h'

[mikesinouye]

/gcbrun

[MrAMS]

To reproduce this error, replace my forked http_archive with the original in MrAMS/bazel-chisel-demo/rules/repo.bzl#L98 and run make run

[mikesinouye]

Thanks!