fix: update NetSurf port & montauk frontend to use new paths for fonts and icons

www-client/netsurf/patches/0013-bitmap-rowstride-and-bounds.patch

@@ -0,0 +1,21 @@
+diff --git a/frontends/monkey/bitmap.c b/frontends/monkey/bitmap.c
+index cc13c8b..60104ec 100644
+--- a/frontends/monkey/bitmap.c
++++ b/frontends/monkey/bitmap.c
+@@ -36,12 +36,16 @@ struct bitmap {
+ 
+ static void *bitmap_create(int width, int height, enum gui_bitmap_flags flags)
+ {
++	if (width <= 0 || height <= 0 || width > 8192 || height > 8192 ||
++	    (size_t)width * (size_t)height > 32u * 1024u * 1024u)
++		return NULL;
+ 	struct bitmap *ret = calloc(1, sizeof(*ret));
+ 	if (ret == NULL)
+ 		return NULL;
+ 
+ 	ret->width = width;
+ 	ret->height = height;
++	ret->rowstride = (size_t)width * 4;
+ 	ret->opaque = (flags & BITMAP_OPAQUE) == BITMAP_OPAQUE;
+ 
+ 	ret->ptr = calloc(width, height * 4);