wget: Fix compilation without deprecated OpenSSL 1.1 APIs

The configure script uses a deprecated function to check for libssl. I tried patching configure.ac
and adding PKG_FIXUP:=autoreconf but that causes a different error. This is the simplest fix.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/wget/Makefile

@@ -78,6 +78,9 @@ ifeq ($(BUILD_VARIANT),ssl)
 	CONFIGURE_ARGS+= \
 		--with-ssl=openssl \
 		--with-libssl-prefix="$(STAGING_DIR)/usr"
+
+	CONFIGURE_VARS += \
+		ac_cv_libssl=yes
 endif
 
 ifeq ($(BUILD_VARIANT),nossl)