Tests: Teach RunCMake to ignore Xcode an IDERunDestination warning

On some Xcode versions, `xcodebuild` may warn:

    ... xcodebuild[...] IDERunDestination: ...

Teach RunCMake to drop such incidental lines before matching against
expected output.

Tests/RunCMake/RunCMake.cmake

@@ -218,6 +218,7 @@ function(run_cmake test)
     "|[^\n]*xcodebuild[^\n]*DVTCoreDeviceEnabledState: DVTCoreDeviceEnabledState_Disabled set via user default"
     "|[^\n]*xcodebuild[^\n]*DVTPlugInManager"
     "|[^\n]*xcodebuild[^\n]*DVTSDK: Warning: SDK path collision for path"
+    "|[^\n]*xcodebuild[^\n]*IDERunDestination: Supported platforms for the buildables in the current scheme is empty"
     "|[^\n]*xcodebuild[^\n]*Requested but did not find extension point with identifier"
     "|[^\n]*xcodebuild[^\n]*nil host used in call to allows.*HTTPSCertificateForHost"
     "|[^\n]*xcodebuild[^\n]*warning: file type[^\n]*is based on missing file type"