pcu: add configs for running without docker

Base on docker-playground.git's ttcn3-pcu-test/*.cfg files, change IPs
to 127.0.0.1, log to stderr, adjust pcu-socket path.

Change-Id: Iff3e5e6cf0c608680c8c5f9f83e8bc1032274ea9
diff --git a/pcu/osmo-pcu.cfg b/pcu/osmo-pcu.cfg
new file mode 100644
index 0000000..d6213b5
--- /dev/null
+++ b/pcu/osmo-pcu.cfg
@@ -0,0 +1,22 @@
+log gsmtap 127.0.0.1
+ logging level set-all debug
+
+log stderr
+ logging filter all 1
+ logging print level 1
+ logging print category 1
+ logging print category-hex 0
+ logging print file basename last
+ logging print extended-timestamp 1
+ logging level set-all debug
+
+line vty
+ no login
+ bind 127.0.0.1
+pcu
+ flow-control-interval 10
+ cs 2
+ alloc-algorithm dynamic
+ alpha 0
+ gamma 0
+ pcu-socket /tmp/pcu_bts