Added configuration for wrapper scripts of msvc toolchain

Now we only need to specify --cpu=x64_windows_msvc when using msvc toolchain

--
Change-Id: Id501dd9ef2fd6553285677605ec75e80499b9ef7
Reviewed-on: https://bazel-review.googlesource.com/#/c/3441
MOS_MIGRATED_REVID=120260588

tools/cpp/BUILD.static

diff --git a/tools/cpp/BUILD.static b/tools/cpp/BUILD.static
index 8181a61..6f5f585 100644
--- a/tools/cpp/BUILD.static
+++ b/tools/cpp/BUILD.static
@@ -31,6 +31,7 @@
         ":cc-compiler-armeabi-v7a",
         ":cc-compiler-freebsd",
         ":cc-compiler-x64_windows",
+        ":cc-compiler-x64_windows_msvc",
         ":empty",
     ],
 )
@@ -76,3 +77,31 @@
     strip_files = ":empty",
     supports_param_files = 1,
 )
+
+cc_toolchain(
+    name = "cc-compiler-x64_windows_msvc",
+    all_files = ":every-file-x64_windows",
+    compiler_files = ":compile-x64_windows",
+    cpu = "x64_windows",
+    dwp_files = ":empty",
+    dynamic_runtime_libs = [":empty"],
+    linker_files = ":empty",
+    objcopy_files = ":empty",
+    static_runtime_libs = [":empty"],
+    strip_files = ":empty",
+)
+
+filegroup(
+    name = "every-file-x64_windows",
+    srcs = [
+        ":compile-x64_windows",
+    ],
+)
+
+filegroup(
+    name = "compile-x64_windows",
+    srcs = glob([
+        "wrapper/bin/msvc_*",
+        "wrapper/bin/pydir/msvc*",
+    ]),
+)
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