package/libassuan: bump to version 2.5.6

For change log, see [1] and [2].

This commit also moves the archive SHA256 hash to the section of hashes
published upstream.

libassuan 2.5.6 updated its gpg-error.m4 macro files to detect
gpgrt-config. Its path needs to be forced in _CONF_ENV to make sure it
will work in all host environments. See the log entry of commit
d7f2d8403e "package/gnupg2: fix build failure when host provides an
old gpgrt-config" [3] for a complete explanation.

[1] https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libassuan.git;a=log;h=libassuan-2.5.6
[2] https://dev.gnupg.org/T6542
[3] https://git.buildroot.org/buildroot/commit/?id=d7f2d8403ec82f3b1772ec17bf1df8c42987a1f8

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libassuan/libassuan.hash

@@ -1,8 +1,8 @@
 # From https://www.gnupg.org/download/integrity_check.html
-sha1  ec4f67c0117ccd17007c748a392ded96dc1b1ae9  libassuan-2.5.5.tar.bz2
+sha1  b1e8754dbf89b3a3eb175f5df75048dbca1fce57  libassuan-2.5.6.tar.bz2
+sha256  e9fd27218d5394904e4e39788f9b1742711c3e6b41689a31aa3380bd5aa4f426  libassuan-2.5.6.tar.bz2
 # Locally calculated after checking signature
-# https://www.gnupg.org/ftp/gcrypt/libassuan/libassuan-2.5.5.tar.bz2.sig
+# https://www.gnupg.org/ftp/gcrypt/libassuan/libassuan-2.5.6.tar.bz2.sig
 # using key D8692123C4065DEA5E0F3AB5249B39D24F25E3B6
-sha256  8e8c2fcc982f9ca67dcbb1d95e2dc746b1739a4668bc20b3a3c5be632edb34e4  libassuan-2.5.5.tar.bz2
 sha256  a9bdde5616ecdd1e980b44f360600ee8783b1f99b8cc83a2beb163a0a390e861  COPYING.LIB
 sha256  fc82ca8b6fdb18d4e3e85cfd8ab58d1bcd3f1b29abe782895abd91d64763f8e7  COPYING

package/libassuan/libassuan.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBASSUAN_VERSION = 2.5.5
+LIBASSUAN_VERSION = 2.5.6
 LIBASSUAN_SITE = https://gnupg.org/ftp/gcrypt/libassuan
 LIBASSUAN_SOURCE = libassuan-$(LIBASSUAN_VERSION).tar.bz2
 LIBASSUAN_LICENSE = LGPL-2.1+ (library), GPL-3.0 (tests, doc)
@@ -15,4 +15,8 @@ LIBASSUAN_CONF_OPTS = \
 	--with-gpg-error-prefix=$(STAGING_DIR)/usr
 LIBASSUAN_CONFIG_SCRIPTS = libassuan-config
 
+# Force the path to "gpgrt-config" (from the libgpg-error package) to
+# avoid using the one on host, if present.
+LIBASSUAN_CONF_ENV += GPGRT_CONFIG=$(STAGING_DIR)/usr/bin/gpgrt-config
+
 $(eval $(autotools-package))