Get MSBuild performance summary

Author: dougbu

.azure/pipelines/ci.yml

@@ -158,6 +158,7 @@ stages:
                 -arch x64
                 -pack
                 -all
+                '/fileLoggerParameters:LogFile=artifacts/log/performance.x64.log;PerformanceSummary;Verbosity=Quiet'
                 $(_BuildArgs)
                 $(_InternalRuntimeDownloadArgs)
                 $(Windows64LogArgs)
@@ -174,6 +175,7 @@ stages:
                 -noBuildJava
                 -noBuildNative
                 /p:OnlyPackPlatformSpecificPackages=true
+                '/fileLoggerParameters:LogFile=artifacts/log/performance.x86.log;PerformanceSummary;Verbosity=Quiet'
                 $(_BuildArgs)
                 $(_InternalRuntimeDownloadArgs)
                 $(Windows86LogArgs)