rename ipaccess-find into abisip-find

The tool is not used only to find ip.access devices, but used to find
any Abis/IP implementing devices, including those supported by OsmoBTS.
diff --git a/openbsc/.gitignore b/openbsc/.gitignore
index fc3d0bf..55f4a31 100644
--- a/openbsc/.gitignore
+++ b/openbsc/.gitignore
@@ -46,7 +46,7 @@
 hlr.sqlite3
 src/utils/bs11_config
 src/ipaccess/ipaccess-config
-src/ipaccess/ipaccess-find
+src/ipaccess/abisip-find
 src/ipaccess/ipaccess-firmware
 src/ipaccess/ipaccess-proxy
 src/utils/isdnsync