libssh2: bump to version 1.8.0

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libssh2/libssh2.hash

@@ -1,2 +1,3 @@
 # Locally calculated after checking pgp signature
-sha256	e4561fd43a50539a8c2ceb37841691baf03ecb7daf043766da1b112e4280d584	libssh2-1.7.0.tar.gz
+# https://www.libssh2.org/download/libssh2-1.8.0.tar.gz.asc
+sha256	39f34e2f6835f4b992cafe8625073a88e5a28ba78f83e8099610a7b3af4676d4	libssh2-1.8.0.tar.gz

package/libssh2/libssh2.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBSSH2_VERSION = 1.7.0
+LIBSSH2_VERSION = 1.8.0
 LIBSSH2_SITE = http://www.libssh2.org/download
 LIBSSH2_LICENSE = BSD
 LIBSSH2_LICENSE_FILES = COPYING