ie8: Override ieproxy to native and copy it to system32.

Fixes https://bugs.winehq.org/show_bug.cgi?id=44005.

src/winetricks

@@ -12824,7 +12824,7 @@ load_ie8()
     w_call msls31
 
     # Change the override to the native so we are sure we use and register them
-    w_override_dlls native,builtin itircl itss jscript msctf mshtml shdoclc shdocvw shlwapi urlmon wininet xmllite
+    w_override_dlls native,builtin ieproxy itircl itss jscript msctf mshtml shdoclc shdocvw shlwapi urlmon wininet xmllite
 
     # IE8 installer will check the version number of iexplore.exe which causes IE8 installer to fail on wine-1.9.0+
     w_override_dlls native iexplore.exe
@@ -12898,6 +12898,12 @@ _EOF_
         w_try_regedit "$W_TMP_WIN"\\set-tabprocgrowth.reg
     fi
 
+    # Builtin ieproxy is in system32, but ie8's lives in Program Files. Native
+    # CLSID path will get overwritten on prefix update. Setting ieproxy to
+    # native doesn't help because setupapi ignores DLL overrides. To work
+    # around this problem, copy native ieproxy to system32.
+    w_try cp -f "${W_PROGRAMS_X86_UNIX}/Internet Explorer/ieproxy.dll" "$W_SYSTEM32_DLLS"
+
     # Seeing is believing
     case $WINETRICKS_GUI in
         none)