Better Windows installer .nsi file

This still requires on carefully staged files in the packaging/windows
directory. Specifically:

- the dll directory (or symlink) points to the installed gtk Windows DLLs
- the mydll directory (or symlink) contains six other DLLs (where the
  cross built DLLs from Fedora for some reason file, but can be
  transparently replaced with the ones from the upstream binary
  package
- the share directory contains the Windows gtk locale files (but only for
  the locales that we support, anyway)

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

packaging/windows/subsurface.nsi

@@ -109,6 +109,8 @@ Section
     File dll\libffi-6.dll
     File dll\libfontconfig-1.dll
     File dll\libfreetype-6.dll
+    File mydll\freetype6.dll
+    File mydll\freetype-config
     File dll\libgdk-win32-2.0-0.dll
     File dll\libgdk_pixbuf-2.0-0.dll
     File dll\libgio-2.0-0.dll
@@ -120,20 +122,22 @@ Section
     File dll\libintl-8.dll
     File dll\libjasper-1.dll
     File dll\libjpeg-62.dll
-    File dll\libpango-1.0-0.dll
-    File dll\libpangocairo-1.0-0.dll
-    File dll\libpangoft2-1.0-0.dll
-    File dll\libpangowin32-1.0-0.dll
+    File mydll\libpango-1.0-0.dll
+    File mydll\libpangocairo-1.0-0.dll
+    File mydll\libpangoft2-1.0-0.dll
+    File mydll\libpangowin32-1.0-0.dll
     File dll\libpixman-1-0.dll
     File dll\libpng15-15.dll
     File dll\libtiff-3.dll
     File dll\libusb-1.0.dll
     File dll\libxml2-2.dll
     File dll\libxslt-1.dll
+    File dll\libexpat-1.dll
     File dll\pthreadGC2.dll
     File dll\zlib1.dll
     File subsurface.ico
     File /r ..\..\locale
+    File /r share
 
     # Store installation folder in registry
     WriteRegStr HKCU "Software\Subsurface" "" $INSTDIR