libs/c-ares: Update to 1.15.0

Full changelog at https://c-ares.haxx.se/changelog.html

Of interest:
* fixes warnings with modern gcc
* reports not found for onion addresses per RFC7686

Signed-off-by: Karl Palsson <karlp@etactica.com>

libs/c-ares/Makefile

@@ -9,14 +9,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=c-ares
-PKG_VERSION:=1.14.0
+PKG_VERSION:=1.15.0
 PKG_RELEASE:=4
 PKG_LICENSE:=MIT
 PKG_CPE_ID:=cpe:/a:c-ares_project:c-ares
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://c-ares.haxx.se/download
-PKG_HASH:=45d3c1fd29263ceec2afc8ff9cd06d5f8f889636eb4e80ce3cc7f0eaf7aadc6e
+PKG_HASH:=6cdb97871f2930530c97deb7cf5c8fa4be5a0b02c7cea6e7c7667672a39d6852
 
 PKG_FIXUP:=autoreconf
 PKG_INSTALL:=1