Use angle brackets (<>) rather than quotes ("") for the include
directives in our .h files. This should avoid some potentially nasty
surprises for Winelib apps.

include/shlwapi.h

diff --git a/include/shlwapi.h b/include/shlwapi.h
index fb0f3f0..9bd10ea 100644
--- a/include/shlwapi.h
+++ b/include/shlwapi.h
@@ -21,13 +21,13 @@
 #ifndef __WINE_SHLWAPI_H
 #define __WINE_SHLWAPI_H
 
-#include "objbase.h"
+#include <objbase.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif /* defined(__cplusplus) */
 
-#include "pshpack1.h"
+#include <pshpack1.h>
 
 #ifndef NO_SHLWAPI_REG
 
@@ -930,7 +930,7 @@
 
 HRESULT WINAPI DllInstall(BOOL,LPCWSTR);
 
-#include "poppack.h" 
+#include <poppack.h> 
 
 #ifdef __cplusplus
 } /* extern "C" */