Include sanitize blacklist and other extra deps as part of scan-deps output

[kousikk]

Summary

Clang's -M mode includes these extra dependencies in its output and clang-scan-deps
should have equivalent behavior, so adding these extradeps to output just like
how its being done for ".d" file generation mode.

[kousikk]

Lint fixes

[Bigcheese]

lgtm. Jan may want to take a look as I believe he was looking at a related issue.

[jkorous]

Looks great! Thanks!

clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp

public:
 
   void finishedMainFile(DiagnosticsEngine &Diags) override {
     llvm::SmallString<256> CanonPath;
     for (const auto &File : getDependencies()) {
       CanonPath = File;
       llvm::sys::path::remove_dots(CanonPath, /*remove_dot_dot=*/true);
       C.handleFileDependency(*Opts, CanonPath);
     }
+    for (const auto& ExtraDep : Opts->ExtraDeps)
+      C.handleFileDependency(*Opts, ExtraDep);
   }
 
 private:
   std::unique_ptr<DependencyOutputOptions> Opts;
   DependencyConsumer &C;
 };
 
 /// A proxy file system that doesn't call `chdir` when changing the working

clang/test/ClangScanDeps/Inputs/non-header-dependency.json

+[
+    {
+      "directory": "DIR",
+      "command": "clang -E DIR/non-header-dependency_input.cpp -fsanitize=bounds -fsanitize-blacklist=DIR/Inputs/sanitize-blacklist.txt",
+      "file": "DIR/non-header-dependency_input.cpp"
+    }
+]

clang/test/ClangScanDeps/Inputs/sanitize-blacklist.txt

+fun:*

clang/test/ClangScanDeps/non-header-dependency.cpp

+// RUN: rm -rf %t.dir
+// RUN: rm -rf %t.cdb
+// RUN: mkdir -p %t.dir
+// RUN: cp %s %t.dir/non-header-dependency_input.cpp
+// RUN: mkdir %t.dir/Inputs
+// RUN: cp %S/Inputs/sanitize-blacklist.txt %t.dir/Inputs/sanitize-blacklist.txt
+// RUN: sed -e "s|DIR|%/t.dir|g" %S/Inputs/non-header-dependency.json > %t.cdb
+//
+// RUN: clang-scan-deps -compilation-database %t.cdb -j 1 | FileCheck %s
+
+#define FOO "foo"
+
+// CHECK: Inputs{{/|\\}}sanitize-blacklist.txt
+// CHECK-NEXT: non-header-dependency_input.cpp