axel: bump to version 2.16.1

Fixes building against static libssl:

  http://autobuild.buildroot.net/results/7edb3756a07bbac27f852332b81677feb6156a48/

The major change between 2.16 and 2.16.1 that fixes static linking
with libssl is that pkg-config is now used to detect
libssl. Therefore, we add a dependency on host-pkgconf.

Signed-off-by: Ismael Luceno <ismael@iodev.co.uk>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/axel/axel.hash

@@ -1 +1 @@
-sha256 bd65f8d8add34ab61ce1fb9e1c7b1c3449b1cfd981ce48aeee218e755ba0d6fb  axel-2.16.tar.xz
+sha256 d34094eb63eaebc989f96eabdda091dcfb28e840bb8d274a5f216775941f59e4  axel-2.16.1.tar.xz

package/axel/axel.mk

@@ -4,12 +4,12 @@
 #
 ################################################################################
 
-AXEL_VERSION = 2.16
+AXEL_VERSION = 2.16.1
 AXEL_SITE = https://github.com/axel-download-accelerator/axel/releases/download/v$(AXEL_VERSION)
 AXEL_SOURCE = axel-$(AXEL_VERSION).tar.xz
 AXEL_LICENSE = GPL-2.0+
 AXEL_LICENSE_FILES = COPYING
-AXEL_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES)
+AXEL_DEPENDENCIES = host-pkgconf $(TARGET_NLS_DEPENDENCIES)
 
 # ac_cv_prog_cc_c99 is required for BR2_USE_WCHAR=n because the C99 test
 # provided by autoconf relies on wchar_t.