Adding a copy of the input files for coverage to consume.

Author: finn-ball

src/main/java/com/google/devtools/build/lib/exec/StandaloneTestStrategy.java

@@ -463,6 +463,7 @@ private static Spawn createCoveragePostProcessingSpawn(
         action.getLcovMergerRunfilesSupplier(),
         /* filesetMappings= */ ImmutableMap.of(),
         /* inputs= */ NestedSetBuilder.<ActionInput>compileOrder()
+            .addAll(ImmutableList.copyOf(action.getInputs().toList()))
             .addAll(expandedCoverageDir)
             .add(action.getCollectCoverageScript())
             .add(action.getCoverageDirectoryTreeArtifact())