cjson: fix error with sh4a and powerpc

Fixes:
 - http://autobuild.buildroot.net/results/3d899790acdc5c21733ff6f7f5a1b500e862ea0a

Signed-off-by: Fabrice Fontaine <fabrice.fontaine@orange.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/cjson/cjson.hash

@@ -1,2 +1,3 @@
 # Locally computed:
 sha256	3487795d54440bdbd41b4b8e7688889526f2f9a652639f6036b9965016c800e7	cjson-v1.1.0.tar.gz
+sha256	8eea780ee5729275a5076002d92a4c7854ecb89968b26a81efeb5bd9828268a0	fcc89c4bb264d665929b00eeebc479a643a90896.patch

package/cjson/cjson.mk

@@ -10,4 +10,10 @@ CJSON_INSTALL_STAGING = YES
 CJSON_LICENSE = MIT
 CJSON_LICENSE_FILES = LICENSE
 
+# This patch fixes -Werror=strict-overflow compile errors on sh4a and powerpc
+# toolchains:
+# http://autobuild.buildroot.net/results/3d899790acdc5c21733ff6f7f5a1b500e862ea0a
+CJSON_PATCH = \
+	https://github.com/DaveGamble/cjson/commit/fcc89c4bb264d665929b00eeebc479a643a90896.patch
+
 $(eval $(cmake-package))