[NTP][Realbox] Fixes the search icon position in realbox for RTL

For some reason [dir=rtl] :-webkit-any(#realbox-icon, .match-icon) is
less specific than#realbox-icon in RTL preventing the former CSS rule
from applying to the #realbox-icon 

Bug: 1067503
Change-Id: I4b6c86429ca6714b37b40ce5cb745641e0c30830
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134649
Commit-Queue: Moe Ahmadi <mahmadi@chromium.org>
Auto-Submit: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756772}

chrome/browser/resources/local_ntp/local_ntp.css

@@ -225,7 +225,8 @@ body.hide-fakebox #fakebox {
   width: 24px;
 }
 
-[dir=rtl] :-webkit-any(#realbox-icon, .match-icon) {
+[dir=rtl] #realbox-icon,
+[dir=rtl] .match-icon {
   left: auto;
   right: 16px;
 }