mbedtls: update to 2.16.11

Switched to AUTORELEASE to avoid manual increments.

Release notes:
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.11

Signed-off-by: Rosen Penev <[email protected]>

package/libs/mbedtls/Makefile

@@ -8,13 +8,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mbedtls
-PKG_VERSION:=2.16.10
-PKG_RELEASE:=1
+PKG_VERSION:=2.16.11
+PKG_RELEASE:=$(AUTORELEASE)
 PKG_USE_MIPS16:=0
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/ARMmbed/mbedtls/tar.gz/v$(PKG_VERSION)?
-PKG_HASH:=96257bb03b30300b2f35f861ffe204ed957e9fd0329d80646fe57fc49f589b29
+PKG_HASH:=c18e7e9abf95e69e425260493720470021384a1728417042060a35d0b7b18b41
 
 PKG_LICENSE:=GPL-2.0-or-later
 PKG_LICENSE_FILES:=gpl-2.0.txt