[gn] port 2499fe1 (llvm-offload-binary)

2499fe1 did remove clang-offload-packager from the GN build,
but it didn't add the new tool. This commit does that.

Author: nico

llvm/utils/gn/secondary/clang/test/BUILD.gn

@@ -185,6 +185,7 @@ group("test") {
     "//llvm/tools/llvm-nm:symlinks",
     "//llvm/tools/llvm-objcopy:symlinks",
     "//llvm/tools/llvm-objdump:symlinks",
+    "//llvm/tools/llvm-offload-binary",
     "//llvm/tools/llvm-pdbutil",
     "//llvm/tools/llvm-profdata",
     "//llvm/tools/llvm-rc:symlinks",

llvm/utils/gn/secondary/llvm/test/BUILD.gn

@@ -303,6 +303,7 @@ group("test") {
     "//llvm/tools/llvm-nm",
     "//llvm/tools/llvm-objcopy:symlinks",
     "//llvm/tools/llvm-objdump:symlinks",
+    "//llvm/tools/llvm-offload-binary",
     "//llvm/tools/llvm-offload-wrapper",
     "//llvm/tools/llvm-opt-fuzzer",
     "//llvm/tools/llvm-opt-report",

llvm/utils/gn/secondary/llvm/tools/llvm-offload-binary/BUILD.gn

@@ -0,0 +1,8 @@
+executable("llvm-offload-binary") {
+  deps = [
+    "//llvm/lib/BinaryFormat",
+    "//llvm/lib/Object",
+    "//llvm/lib/Support",
+  ]
+  sources = [ "llvm-offload-binary.cpp" ]
+}