package/harfbuzz: fix build without cairo-svg

Fixes:
http://autobuild.buildroot.org/results/f6c0b85fa476e0f52cc06f0133d2e4f9920f7556
test-ot-color.cc:40:10: fatal error: cairo-svg.h: No such file or directory
   40 | #include <cairo-svg.h>
      |          ^~~~~~~~~~~~~

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/harfbuzz/0001-Add-missing-cairo-svg-dependency-to-test-ot-color.patch

@@ -0,0 +1,38 @@
+From c2d7dfc68ffcb389c9f73b5ef94da7b270bdcf9e Mon Sep 17 00:00:00 2001
+From: James Hilliard <james.hilliard1@gmail.com>
+Date: Sat, 22 Jun 2019 19:38:48 -0600
+Subject: [PATCH] Add missing cairo-svg dependency to test-ot-color
+
+Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
+[james.hilliard1@gmail.com: backport from upstream commit
+c2d7dfc68ffcb389c9f73b5ef94da7b270bdcf9e]
+---
+ src/test-ot-color.cc | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/src/test-ot-color.cc b/src/test-ot-color.cc
+index 44bd2eb6..e9126c06 100644
+--- a/src/test-ot-color.cc
++++ b/src/test-ot-color.cc
+@@ -25,7 +25,9 @@
+ 
+ #include "hb.hh"
+ 
+-#ifndef HB_NO_COLOR
++#include <cairo.h>
++
++#if !defined(HB_NO_COLOR) && defined(CAIRO_HAS_SVG_SURFACE)
+ 
+ #include "hb-ot.h"
+ 
+@@ -35,7 +37,6 @@
+ #include FT_FREETYPE_H
+ #include FT_GLYPH_H
+ 
+-#include <cairo.h>
+ #include <cairo-ft.h>
+ #include <cairo-svg.h>
+ 
+-- 
+2.20.1
+

package/harfbuzz/harfbuzz.mk

@@ -30,7 +30,7 @@ ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
 HARFBUZZ_CONF_ENV = LDFLAGS="$(TARGET_LDFLAGS) -pthread"
 endif
 
-ifeq ($(BR2_PACKAGE_CAIRO_SVG),y)
+ifeq ($(BR2_PACKAGE_CAIRO),y)
 HARFBUZZ_DEPENDENCIES += cairo
 HARFBUZZ_CONF_OPTS += --with-cairo=yes
 else