Windows, native: add windows_msvc config_setting

Update `select` statements in BUILD files with the
new config_setting.

This is a first step on a long path that leads to
us being able to compile bazel on Windows with
--cpu=x64_windows_msvc. Needless to say, we're not
there yet.

Tested: on Linux, Darwin, Windows/MSYS

--
MOS_MIGRATED_REVID=134534613

scripts/packages/BUILD

@@ -8,6 +8,7 @@ filegroup(
     name = "packages",
     srcs = select({
         "//src:windows": [],
+        "//src:windows_msvc": [],
         "//src:darwin": [
             ":install.sh",
             ":generate-package-info",

src/BUILD

@@ -9,6 +9,7 @@ filegroup(
         ":darwin": ["//src/main/native:libunix.dylib"],
         ":darwin_x86_64": ["//src/main/native:libunix.dylib"],
         ":windows": ["//src/main/native:windows_jni.dll"],
+        ":windows_msvc": ["//src/main/native:windows_jni.dll"],
         "//conditions:default": ["//src/main/native:libunix.so"],
     }),
     visibility = [
@@ -273,6 +274,12 @@ config_setting(
     visibility = ["//visibility:public"],
 )
 
+config_setting(
+    name = "windows_msvc",
+    values = {"cpu": "x64_windows_msvc"},
+    visibility = ["//visibility:public"],
+)
+
 filegroup(
     name = "srcs",
     srcs = glob(["**"]) + [

src/main/cpp/BUILD

@@ -24,6 +24,9 @@ cc_library(
         "//src:windows": [
             "blaze_util_mingw.cc",
         ],
+        "//src:windows_msvc": [
+            "blaze_util_msvc.cc",
+        ],
         "//conditions:default": [
             "blaze_util_linux.cc",
             "blaze_util_posix.cc",