Add black stroke for us highway shields

svgs/svgs_not_in_iconset/us-highway_2.svg

@@ -7,7 +7,7 @@
 <svg  version="1.1" id="Layer_1" xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" width="30" height="30" viewBox="0 0 600 600"
 	 overflow="visible" enable-background="new 0 0 600 600" xml:space="preserve">
 <g>
-	<path fill-rule="evenodd" clip-rule="evenodd" fill="#FFFFFF" d="M300,10.0024414
+	<path fill-rule="evenodd" clip-rule="evenodd" stroke="#000000" stroke-width="30" fill="#FFFFFF" d="M300,10.0024414
 		c23.5644531,20.0751953,54.1171875,32.1914063,87.5,32.1914063S451.4355469,30.0751953,475,10l115,115
 		c-21.1621094,30.0805664-33.5878906,66.753418-33.5878906,106.3271484c0,28.4628906,6.4267578,55.4238281,17.9101563,79.5117188
 		C584.2441406,331.6640625,590,355.3945313,590,380c0,88.3671875-71.6328125,160-160,160h-25.1132813

svgs/svgs_not_in_iconset/us-highway_3.svg

@@ -7,7 +7,7 @@
 <svg  version="1.1" id="Layer_1" xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" width="37.5" height="30" viewBox="0 0 750 600"
 	 overflow="visible" enable-background="new 0 0 750 600" xml:space="preserve">
 <g>
-	<path fill-rule="evenodd" clip-rule="evenodd" fill="#FFFFFF" d="M375,10.0019531
+	<path fill-rule="evenodd" clip-rule="evenodd" stroke="#000000" stroke-width="30" fill="#FFFFFF" d="M375,10.0019531
 		c-36.3276367,22.4638672-79.1499023,35.4287109-125.0004883,35.4287109C204.1494141,45.4306641,161.3271484,32.4638672,125,10
 		L10,125c21.1630859,30.0810547,33.5883789,66.7524414,33.5883789,106.3271484
 		c0,28.5605469-6.472168,55.6088867-18.0288086,79.7587891C15.5854492,331.9560547,9.9995117,355.3261719,9.9995117,380

svgs/svgs_not_in_iconset/us-state_2.svg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="30" height="30" viewBox="0 0 600 600">
-	<circle r="287.5" cx="300" cy="300" style="fill:#fff;fill-opacity:1;stroke:none"/>
+	<circle r="287.5" cx="300" cy="300" fill="#ffffff" fill-opacity="1" stroke="#000000" stroke-width="30"/>
 </svg>

svgs/svgs_not_in_iconset/us-state_3.svg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="37.5" height="30" viewBox="0 0 750 600">
-	<ellipse rx="362.5" ry="287.5" cx="375" cy="300" style="fill:#fff;fill-opacity:1;stroke:none"/>
+	<ellipse rx="362.5" ry="287.5" cx="375" cy="300" fill="#ffffff" fill-opacity="1" stroke="#000000" stroke-width="30"/>
 </svg>