library: S1AP encoding/decoding using libfftranscode and ASN.1 from V15.5.0

This allows us to encode/decode 3GPP S1AP messages, as used on the S1
interface control plane between eNodeB and MME.

Change-Id: Ie019bef1f3ef9cc5f6c94a64c7f352c510fb5633
diff --git a/library/s1ap/regen_makefile.sh b/library/s1ap/regen_makefile.sh
new file mode 100755
index 0000000..fae086c
--- /dev/null
+++ b/library/s1ap/regen_makefile.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+FILES="*.asn *.ttcn S1AP_EncDec.cc"
+
+../../regen-makefile.sh $FILES
+
+sed -i -e '/^CPPFLAGS/ s/$/ `pkg-config --cflags libfftranscode`/' Makefile
+sed -i -e '/^LDFLAGS/ s/$/ `pkg-config --libs libfftranscode`/' Makefile
+sed -i -e '/^LINUX_LIBS/ s/$/ `pkg-config --libs libfftranscode`/' Makefile