package/libopenmpt: bump to version 0.7.13

For release note since 0.7.11, see:
https://lib.openmpt.org/libopenmpt/2024/12/01/releases-0.7.12-0.6.21-0.5.35-0.4.47/
https://lib.openmpt.org/libopenmpt/2025/01/06/releases-0.7.13-0.6.22-0.5.36-0.4.48/

License file hash changed after year update:
https://github.com/OpenMPT/openmpt/commit/97f0c59cda82ff92d905fb1af8d55a89997a6a8b

Signed-off-by: Julien Olivain <ju.o@free.fr>

package/libopenmpt/libopenmpt.hash

@@ -1,3 +1,3 @@
 # computed locally
-sha256  53a798b8c6e2e1f695e8ad05e93a0c1b53199e5aa9981837c41696b370520767  libopenmpt-0.7.11+release.autotools.tar.gz
-sha256  e3d7e76c6b441ddd9fff0a397e7b5e055a11678bd7c3b246a0ce13e352eb15e8  LICENSE
+sha256  dcd7cde4f9c498eb496c4556e1c1b81353e2a74747e8270a42565117ea42e1f1  libopenmpt-0.7.13+release.autotools.tar.gz
+sha256  d173856a870d3f6d0603060c615f5e3b145d79a008576e8efd2e5eab8b843430  LICENSE

package/libopenmpt/libopenmpt.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBOPENMPT_VERSION = 0.7.11
+LIBOPENMPT_VERSION = 0.7.13
 LIBOPENMPT_SITE = https://lib.openmpt.org/files/libopenmpt/src
 LIBOPENMPT_SOURCE = libopenmpt-$(LIBOPENMPT_VERSION)+release.autotools.tar.gz
 LIBOPENMPT_LICENSE = BSD-3-Clause