package/libpjsip: update to 2.15.1

For a changelog see here:
https://github.com/pjsip/pjproject/releases/tag/2.15.1

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>

package/libpjsip/libpjsip.hash

@@ -1,3 +1,3 @@
 # Locally computed
-sha256  5805c1171acab4af9684d7ad096dcb92f71fc42809852144e97e1413468c9981  pjproject-2.14.tar.gz
+sha256  8f3bd99caf003f96ed8038b8a36031eb9d8cd9eaea1eaff7e01c2eef6bd55706  pjproject-2.15.1.tar.gz
 sha256  8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING

package/libpjsip/libpjsip.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBPJSIP_VERSION = 2.14
+LIBPJSIP_VERSION = 2.15.1
 LIBPJSIP_SOURCE = pjproject-$(LIBPJSIP_VERSION).tar.gz
 LIBPJSIP_SITE = $(call github,pjsip,pjproject,$(LIBPJSIP_VERSION))