add svg support to cygwin emacs-w32

emacs-24.5-cygwin-rsvg.diff

--- ./configure.ac.orig	2015-04-02 16:23:06.000000000 +0900
+++ ./configure.ac	2015-04-11 07:31:33.786673500 +0900
@@ -2236,7 +2236,7 @@
 
 ### Use -lrsvg-2 if available, unless `--with-rsvg=no' is specified.
 HAVE_RSVG=no
-if test "${HAVE_X11}" = "yes" || test "${HAVE_NS}" = "yes" || test "${opsys}" = "mingw32"; then
+if test "${HAVE_X11}" = "yes" || test "${HAVE_NS}" = "yes" || test "${HAVE_W32}" = "yes"; then
   if test "${with_rsvg}" != "no"; then
     RSVG_REQUIRED=2.11.0
     RSVG_MODULE="librsvg-2.0 >= $RSVG_REQUIRED"
--- ./src/image.c.orig	2015-04-02 16:23:06.000000000 +0900
+++ ./src/image.c	2015-04-11 07:31:33.793672400 +0900
@@ -9523,7 +9523,7 @@
 #if defined (HAVE_RSVG)
   DEFSYM (Qsvg, "svg");
   ADD_IMAGE_TYPE (Qsvg);
-#ifdef HAVE_NTGUI
+#if defined HAVE_NTGUI && !defined CYGWIN
   /* Other libraries used directly by svg code.  */
   DEFSYM (Qgdk_pixbuf, "gdk-pixbuf");
   DEFSYM (Qglib, "glib");