Fix fmgroids.h not regenerated after "clean" (not "clean dist") on Windows

>From 29aa537a8e5ef50f620e104eb98bca74538b5ac7 Mon Sep 17 00:00:00 2001
From: Craig Ringer <ringerc@ringerc.id.au>
Date: Thu, 6 Dec 2012 03:25:17 -0800
Subject: [PATCH] Win32: replace fmgroids.h if removed by clean.bat

Fix a win32 build issue

clean.bat was removing src/include/utils/fmgroids.h
but build.bat wasn't replacing it if it'd already re-generated
fmgrtab from pg_proc.h. Ensure that src/include/utils/fmgroids.h
is always copied over if it's missing.
---
 src/tools/msvc/Solution.pm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm
index d7dbc5d..850a1df 100644
--- a/src/tools/msvc/Solution.pm
+++ b/src/tools/msvc/Solution.pm
@@ -275,6 +275,9 @@ s{PG_VERSION_STR "[^"]+"}{__STRINGIFY(x) #x\n#define __STRINGIFY2(z) __STRINGIFY
 		system(
 "perl -I ../catalog Gen_fmgrtab.pl ../../../src/include/catalog/pg_proc.h");
 		chdir('..\..\..');
+	}
+	if (IsNewer('src\include\utils\fmgroids.h', 'src\backend\utils\fmgroids.h'))
+	{
 		copyFile('src\backend\utils\fmgroids.h',
 			'src\include\utils\fmgroids.h');
 	}
-- 
1.7.11.msysgit.0