Fix isolation check for MSVC to handle recent changes.

Author: adunstan

src/tools/msvc/vcregress.pl

@@ -149,7 +149,8 @@ sub ecpgcheck
 sub isolationcheck
 {
 	chdir "../isolation";
-	copy("../../../$Config/isolationtester/isolationtester.exe", ".");
+	copy("../../../$Config/isolationtester/isolationtester.exe", 
+		 "../../../$Config/pg_isolation_regress");
 	my @args = (
 		"../../../$Config/pg_isolation_regress/pg_isolation_regress",
 		"--psqldir=../../../$Config/psql",