[gn] port e10f67a

Author: nico

llvm/utils/gn/secondary/clang-tools-extra/clang-doc/BUILD.gn

@@ -2,6 +2,7 @@ static_library("clang-doc") {
   output_name = "clangDoc"
   configs += [ "//llvm/utils/gn/build:clang_code" ]
   deps = [
+    "support",
     "//clang/lib/AST",
     "//clang/lib/ASTMatchers",
     "//clang/lib/Analysis",

llvm/utils/gn/secondary/clang-tools-extra/clang-doc/support/BUILD.gn

@@ -0,0 +1,6 @@
+static_library("support") {
+  output_name = "clangDocSupport"
+  configs += [ "//llvm/utils/gn/build:clang_code" ]
+  deps = [ "//llvm/lib/Support" ]
+  sources = [ "File.cpp" ]
+}