[gn build] (manually) port f8c6515554 (libLLVMDWP)

llvm/utils/gn/secondary/llvm/lib/DWP/BUILD.gn

@@ -0,0 +1,14 @@
+static_library("DWP") {
+  output_name = "LLVMDWP"
+  deps = [
+    "//llvm/lib/DebugInfo/DWARF",
+    "//llvm/lib/MC",
+    "//llvm/lib/Object",
+    "//llvm/lib/Support",
+    "//llvm/lib/Target",
+  ]
+  sources = [
+    "DWP.cpp",
+    "DWPError.cpp",
+  ]
+}

llvm/utils/gn/secondary/llvm/tools/llvm-dwp/BUILD.gn

@@ -19,17 +19,12 @@ group("symlinks") {
 
 executable("llvm-dwp") {
   deps = [
-    "//llvm/lib/CodeGen/AsmPrinter",
     "//llvm/lib/DebugInfo/DWARF",
+    "//llvm/lib/DWP",
     "//llvm/lib/MC",
     "//llvm/lib/Object",
     "//llvm/lib/Support",
-    "//llvm/lib/Target",
     "//llvm/lib/Target:TargetsToBuild",
   ]
-  sources = [
+  sources = [ "llvm-dwp.cpp" ]
-    "DWP.cpp",
-    "DWPError.cpp",
-    "llvm-dwp.cpp",
-  ]
 }