libjson-c: enable rpath for host builds to fix errors on recent macOS

Same approach as on libubox

Signed-off-by: Felix Fietkau <[email protected]>

package/libs/libjson-c/Makefile

@@ -27,6 +27,11 @@ include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/cmake.mk
 
+CMAKE_HOST_OPTIONS += \
+	-DCMAKE_SKIP_RPATH=FALSE \
+	-DCMAKE_MACOSX_RPATH=1 \
+	-DCMAKE_INSTALL_RPATH="${STAGING_DIR_HOST}/lib"
+
 define Package/libjson-c
   SECTION:=libs
   CATEGORY:=Libraries