[nfc] compile_flags.txt fixes (#4449)

Author: mikea

compile_flags.txt

@@ -37,6 +37,7 @@
 -isystembazel-bin/external/capnp-cpp/src/kj/compat/_virtual_includes/kj-gzip
 -isystembazel-bin/external/capnp-cpp/src/kj/compat/_virtual_includes/kj-http
 -isystembazel-bin/external/capnp-cpp/src/kj/compat/_virtual_includes/kj-tls
+-isystembazel-bin/external/workerd-cxx/kj-rs/_virtual_includes/kj-rs-lib/
 -isystembazel-bin/external/v8
 -isystembazel-bin/external/v8/icu
 -isystembazel-bin/src
@@ -51,6 +52,8 @@
 -isystembazel-bin/src/rust/cxx-integration/_virtual_includes/cxx-integration@cxx
 -isystembazel-bin/src/rust/cxx-integration-test/_virtual_includes/cxx-integration-test@cxx
 -isystembazel-bin/src/rust/dns/_virtual_includes/dns@cxx
+-isystembazel-bin/src/rust/python-parser/_virtual_includes/python-parser@cxx
+-isystembazel-bin/src/rust/net/_virtual_includes/net@cxx
 -D_FORTIFY_SOURCE=1
 -D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES
 -D_LIBCPP_NO_ABI_TAG