Fix nightly failure in socket_afpacket.phpt

Alpine has a slighly differently worded error message, so relax the test:

"unable to retrieve peer name [95]: Not supported"

Author: nielsdos

ext/sockets/tests/socket_afpacket.phpt

@@ -34,4 +34,4 @@ bool(true)
 string(2) "lo"
 int(%i)
 
-Warning: socket_getpeername(): unable to retrieve peer name [95]: Operation not supported in %s on line %d
+Warning: socket_getpeername(): unable to retrieve peer name [95]: %sot supported in %s on line %d