[gn build] Port c11976f

Author: aeubanks

llvm/utils/gn/secondary/clang/unittests/Tooling/BUILD.gn

@@ -30,7 +30,7 @@ unittest("ToolingTests") {
     "CastExprTest.cpp",
     "CommentHandlerTest.cpp",
     "CompilationDatabaseTest.cpp",
-    "DependencyScannerTest.cpp",
+    "DependencyScanning/DependencyScannerTest.cpp",
     "DependencyScanning/DependencyScanningFilesystemTest.cpp",
     "DiagnosticsYamlTest.cpp",
     "ExecutionTest.cpp",