tree c3aa15ffe8c429d6e378e9ce3a790f3266e75b56
parent def70d725ae6c4becffc451c786111488acf57bc
author Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA@GMail.Com> 1646697600 +0000
committer Adam Cozzette <acozzette@google.com> 1646866555 -0800

cmake: Replace protobuf_source_dir variable with protobuf_SOURCE_DIR variable (#9596)

protobuf_source_dir variable is no longer needed and has the same value
as protobuf_SOURCE_DIR variable, which is instance of CMake-standard
<PROJECT-NAME>_SOURCE_DIR variable:
https://cmake.org/cmake/help/latest/variable/PROJECT-NAME_SOURCE_DIR.html