Since the interface generator is invoked via a Bazel macro, it will be
expanded in the embedding context of the project using SAPI, so package access
needs to go through the full workspace root @com_google_sandboxed_api.
This change also modifies the CMakeLists.txt accordingly, as the "external"
subdirectory is no longer needed/wanted.
PiperOrigin-RevId: 255918784
Change-Id: I052c687509f65fef7f011a9d1a074a171595330f
If using Sandboxed API from an external Bazel WORKSPACE, dependencies can be
imported by declaring the repository and calling `sapi_deps()`:
```python
git_repository(
name = "com_google_sandboxed_api",
commit = "master",
remote = "https://github.com/google/sandboxed-api.git",
)
load(
"@com_google_sandboxed_api//sandboxed_api/bazel:sapi_deps.bzl",
"sapi_deps",
)
sapi_deps()
```
PiperOrigin-RevId: 255373664
Change-Id: I4c41ffc75e1ca95eb126702cb2d5cedb255191d5
