added border-{top,right,bottom,left}-color rules

Author: Merrifield, Jay

src/rules/fallback-colors.js

@@ -16,6 +16,10 @@ CSSLint.addRule({
                 color: 1,
                 background: 1,
                 "border-color": 1,
+                "border-top-color": 1,
+                "border-right-color": 1,
+                "border-bottom-color": 1,
+                "border-left-color": 1,
                 border: 1,
                 "border-top": 1,
                 "border-right": 1,