Add installer_util_unittests to the GN windows build

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 8268f257af17eb98567667f8321d71a785a47848..737984160301cf49d188b2b63234de6c80ef3a11 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -1603,7 +1603,6 @@ if (!is_android) {
         # but that causes errors in other targets when
         # resulting .res files get referenced multiple times.
         #'<(SHARED_INTERMEDIATE_DIR)/chrome_version/other_version.rc',  TODO(GYP)
-        #'<(SHARED_INTERMEDIATE_DIR)/installer_util_strings/installer_util_strings.rc',  TODO(GYP)
         #'<(SHARED_INTERMEDIATE_DIR)/ui/resources/ui_unscaled_resources.rc',  TODO(GYP)
       ]
 
@@ -1612,6 +1611,7 @@ if (!is_android) {
         #'browser/safe_browsing/incident_reporting/verifier_test/verifier_unittest.gyp:verifier_test_dll_2',  TODO(GYP)
         #'chrome_version_resources',  TODO(GYP)
         "//chrome_elf:blacklist_test_dll_1",
+        "//chrome/installer/util:strings",
         "//third_party/iaccessible2",
         "//third_party/isimpledom",
         "//third_party/wtl",