ustream-ssl: bump to latest Git HEAD

5e1bc34 ustream-openssl: clear error stack before SSL_read/SSL_write
f7f93ad add support for specifying usable ciphers

Also bump the ABI version since the layout of `struct ustream_ssl_ops`
changed.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/libs/ustream-ssl/Makefile

@@ -5,9 +5,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/ustream-ssl.git
-PKG_SOURCE_DATE:=2020-01-05
-PKG_SOURCE_VERSION:=30cebb4fc78e49e0432a404f7c9dd8c9a93b3cc3
-PKG_MIRROR_HASH:=b37b730b8fcd5186d7b194a6e90b79efad845ec89e2b9d2d49b4d347c7c4cbcb
+PKG_SOURCE_DATE:=2020-03-13
+PKG_SOURCE_VERSION:=5e1bc3429cbf9c3be4db65ef5dbf21ea99cf5b95
+PKG_MIRROR_HASH:=c59dea9b98d3ce88d886f7c7b3b252c55312ad281b731ab9172ae78570f1b643
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=ISC
@@ -23,7 +23,7 @@ define Package/libustream/default
   CATEGORY:=Libraries
   TITLE:=ustream SSL Library
   DEPENDS:=+libubox
-  ABI_VERSION:=20150806
+  ABI_VERSION:=20200215
 endef
 
 define Package/libustream-openssl