pw_protobuf_compiler: Disable include check for generated headers
pw_protobuf_compiler: Disable include check for generated headers

Disable GN include checks for Nanopb RPC protobuf libraries. Include
checks were accidentally disabled for Nanopb libraries rather than
Nanopb RPC libraries.

Change-Id: Ib9fcd30bba106ddfd403f038867c56a3b6180da8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/48684
Pigweed-Auto-Submit: Wyatt Hepler <cca3bedb37979eacd157a9bceb473582df8aea1e@google.com>
Reviewed-by: Joe Ethier <f5eb8cb2f5310c7fa9df6f16eabccb4436f47999@google.com>
Commit-Queue: Auto-Submit <14637eda5603879df170705285bf30f5996692f0@pigweed.google.com.iam.gserviceaccount.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed