Turn 'buildForRunning' on for 'GCDWebServers' iOS and Mac Schemes

This fixes building the project using Carthage (See #212)

GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers (Mac).xcscheme

@@ -8,7 +8,7 @@
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "NO"
-            buildForRunning = "NO"
+            buildForRunning = "YES"
             buildForProfiling = "YES"
             buildForArchiving = "YES"
             buildForAnalyzing = "YES">

GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers (iOS).xcscheme

@@ -8,7 +8,7 @@
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "NO"
-            buildForRunning = "NO"
+            buildForRunning = "YES"
             buildForProfiling = "YES"
             buildForArchiving = "YES"
             buildForAnalyzing = "YES">