package/subversion: security version bump to 1.9.3

package/subversion: security version bump to 1.9.3

Release announcement:
http://mail-archives.apache.org/mod_mbox/subversion-dev/201512.mbox/%3CCAP_GPNj_GCA869VQeJUrp5ngXsgN7pQQHSS=sqoXm8_6hHTTxg@mail.gmail.com%3E

CVE-2015-5259:
Remotely triggerable heap overflow and out-of-bounds read caused by
integer overflow in the svn:// protocol parser.
http://subversion.apache.org/security/CVE-2015-5259-advisory.txt

CVE-2015-5343:
Remotely triggerable heap overflow and out-of-bounds read in mod_dav_svn
caused by integer overflow when parsing skel-encoded request bodies.
http://subversion.apache.org/security/CVE-2015-5343-advisory.txt

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>