transmission: add new syscall needed with musl 1.2.4

Apparently the "revcmsg" syscall is now needed, add it to the list
of allowed syscalls.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

net/transmission/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=transmission
 PKG_VERSION:=4.0.3
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://github.com/transmission/transmission/releases/download/$(PKG_VERSION)/

net/transmission/files/transmission-daemon.json

@@ -78,6 +78,7 @@
 				"readlinkat",
 				"readv",
 				"recvfrom",
+				"recvmsg",
 				"rename",
 				"renameat",
 				"rmdir",