Added configurations and files for profile guided optimization (PGO).
diff --git a/PCbuild9/pgupdate.vsprops b/PCbuild9/pgupdate.vsprops
new file mode 100644
index 0000000..826242d
--- /dev/null
+++ b/PCbuild9/pgupdate.vsprops
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioPropertySheet
+ ProjectType="Visual C++"
+ Version="8.00"
+ Name="pgoptimize"
+ InheritedPropertySheets="$(SolutionDir)\pginstrument.vsprops"
+ >
+ <Tool
+ Name="VCLinkerTool"
+ LinkTimeCodeGeneration="4"
+ />
+</VisualStudioPropertySheet>