Adding 'lib' prefix to v140 static lib to prevent collision with import lib name

Author: ras0219-msft

Release/src/build/vs14.static/casablanca140.static.vcxproj

@@ -35,7 +35,7 @@
     <DebugFileSuffix>d</DebugFileSuffix>
   </PropertyGroup>
   <PropertyGroup>
-    <TargetName>$(CppRestBaseFileName)140$(DebugFileSuffix)_$(CppRestSDKVersionFileSuffix)</TargetName>
+    <TargetName>lib$(CppRestBaseFileName)140$(DebugFileSuffix)_$(CppRestSDKVersionFileSuffix)</TargetName>
   </PropertyGroup>
   <ItemGroup>
     <None Include="packages.config">