Windows: check in the icon resource file

The icon resource is a simple object file, built
by rc.exe, but rc.exe is part of the Windows Kit,
not of Visual Studio, and we have no reliable way
to locate it, so we can't reliably rebuild the
icon resource from source.

Rather than having a brittle genrule that may or
may not find the resource compiler, thus may or
may not successfully build the icon resource and
thus fail the whole build for //src:bazel.exe,
let's just use a prebuilt object file.

In a subsequent commit I'll add a script that can
rebuild this file.

Change-Id: Ia1f31ca9e78378088f93c9db144a2b708d690893
PiperOrigin-RevId: 163332738

src/main/cpp/BUILD

@@ -83,8 +83,8 @@ cc_binary(
         "global_variables.h",
         "main.cc",
     ] + select({
-        "//src:windows": ["//src/main/native/windows:resources"],
-        "//src:windows_msvc": ["//src/main/native/windows:resources"],
+        "//src:windows": ["//src/main/native/windows:resources.o"],
+        "//src:windows_msvc": ["//src/main/native/windows:resources.o"],
         "//conditions:default": [],
     }),
     copts = select({

src/main/native/windows/BUILD

@@ -1,5 +1,10 @@
 package(default_visibility = ["//visibility:private"])
 
+exports_files(
+    ["resources.o"],
+    visibility = ["//src/main/cpp:__pkg__"],
+)
+
 filegroup(
     name = "srcs",
     srcs = glob(["**"]),
@@ -48,21 +53,3 @@ genrule(
         "//src/tools/android/java/com/google/devtools/build/android:__subpackages__",
     ],
 )
-
-genrule(
-    name = "resources",
-    srcs = ["//site:images/favicon.ico"],
-    outs = ["resources.o"],
-    cmd = " ".join([
-        "$(location compile-resources.sh)",
-        "$(location //site:images/favicon.ico)",
-        "$@",
-        "$(location gen_vsenv_stub.sh)",
-    ]),
-    output_to_bindir = 1,
-    tools = [
-        "compile-resources.sh",
-        "gen_vsenv_stub.sh",
-    ],
-    visibility = ["//src/main/cpp:__pkg__"],
-)