libsndfile: security bump to version 1.0.26

Fixes:
CVE-2014-9496 - SD2 buffer read overflow.
CVE-2014-9756 - file_io.c divide by zero.
CVE-2015-7805 - AIIF heap write overflow.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libsndfile/libsndfile.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking pgp signature
-sha256	59016dbd326abe7e2366ded5c344c853829bebfd1702ef26a07ef662d6aa4882	libsndfile-1.0.25.tar.gz
+sha256	cd6520ec763d1a45573885ecb1f8e4e42505ac12180268482a44b28484a25092	libsndfile-1.0.26.tar.gz

package/libsndfile/libsndfile.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBSNDFILE_VERSION = 1.0.25
+LIBSNDFILE_VERSION = 1.0.26
 LIBSNDFILE_SITE = http://www.mega-nerd.com/libsndfile/files
 LIBSNDFILE_INSTALL_STAGING = YES
 LIBSNDFILE_LICENSE = LGPLv2.1+