Commits on Nov 3, 2022

1. Fix identical gcov json file name problem …

   **The problem:**
   
   Bazel moves all `.gcov.json.gz` files to one directory. If in a test target, two source files have identical names, then the second `.gcov.json.gz` overwrites the first one.
   
   **The solution:**
   
   I added `gcno_path` to the move destination in order to distinguish multiple `.gcov.json.gz` with the same name.
   
   **Testing:**
   
   In the `test_cc_test_coverage_gcov` test case I added the `different/a.cc` source file, so currently we have the following source tree:
   ```
   coverage_srcs/a.h
   coverage_srcs/a.cc
   coverage_srcs/b.h
   coverage_srcs/t.cc
   coverage_srcs/different/a.h
   coverage_srcs/different/a.cc
   ```
   
   gcda and gcno files are created next to the source files. The final `gcov.json` files are placed in the corresponding paths:
   ```
   $COVERAGE_DIR_VAR/coverage_srcs/*a.gcov.json.gz
   $COVERAGE_DIR_VAR/coverage_srcs/*t.gcov.json.gz
   $COVERAGE_DIR_VAR/coverage_srcs/different/*a.gcov.json.gz
   ```
   
   Closes bazelbuild#16527.
   
   PiperOrigin-RevId: 483911427
   Change-Id: I1608407e4b7264fb5fd436997bdc344344932b97

   

   krisukox committed Nov 3, 2022
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