Make CoreUnit scheme buildable (#9081)

Author: ncooke3

scripts/spm_test_schemes/CoreUnit.xcscheme

@@ -8,7 +8,7 @@
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "YES"
-            buildForRunning = "NO"
+            buildForRunning = "YES"
             buildForProfiling = "NO"
             buildForArchiving = "NO"
             buildForAnalyzing = "YES">
@@ -57,6 +57,15 @@
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
       debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "CoreUnit"
+            BuildableName = "CoreUnit"
+            BlueprintName = "CoreUnit"
+            ReferencedContainer = "container:">
+         </BuildableReference>
+      </MacroExpansion>
    </ProfileAction>
    <AnalyzeAction
       buildConfiguration = "Debug">
@@ -65,4 +74,4 @@
       buildConfiguration = "Release"
       revealArchiveInOrganizer = "YES">
    </ArchiveAction>
-</Scheme>
+</Scheme>