gn build: Port d090311

e60a69a created a dependency on clangFrontend from clangDriver.
This broke the build of clang-offload-bundler because it only depends
on Driver (and only in debug builds, probably because the dependency was
dead code in clang-offload-bundler). Add the dependency to fix the build,
which also ports d090311 from CMake.

Author: pcc

llvm/utils/gn/secondary/clang/lib/Driver/BUILD.gn

@@ -14,6 +14,7 @@ static_library("Driver") {
     # See the review thread of r311958 for details.
     "//clang/include/clang/StaticAnalyzer/Checkers",
     "//clang/lib/Basic",
+    "//clang/lib/Frontend",
     "//clang/lib/Options",
     "//llvm/include/llvm/Config:llvm-config",
     "//llvm/lib/BinaryFormat",

llvm/utils/gn/secondary/clang/lib/Frontend/BUILD.gn

@@ -6,7 +6,6 @@ static_library("Frontend") {
     "//clang/lib/APINotes",
     "//clang/lib/AST",
     "//clang/lib/Basic",
-    "//clang/lib/Driver",
     "//clang/lib/Edit",
     "//clang/lib/Lex",
     "//clang/lib/Options",