HNBAP, RUA and RANAP protocol codecs

This patch introduces protocol codecs for the HNBAP, RUA and RANAP
protocols, which is mandatory for testing IuCS, IuPS or Iuh in
the future.

As Eclipse TITAN ASN.1 only supports the BER codec and the above
protocols all use APER, we need to use an external transcoder from
APER to BER and vice-versa.  This was implemented using a proprietary
ASN.1 compiler / trnaslator which sysmocom is packaging as
libfftranscode, which is made available as binary package
for Debian 9 at https://ftp.osmocom.org/binaries/libfftranscode/

Related: OS#2856, OS#2857, OS#2858
Change-Id: If4a72de9bc54d6e6a7daaca78a4d4aa5684203a5
diff --git a/library/rua/RUA_CommonDataTypes.asn b/library/rua/RUA_CommonDataTypes.asn
new file mode 100644
index 0000000..4212bb5
--- /dev/null
+++ b/library/rua/RUA_CommonDataTypes.asn
@@ -0,0 +1,53 @@
+-- RUA-CommonDataTypes.asn
+--
+-- 3GPP TS 25.468 V9.1.0 (2010-03)
+-- http://www.3gpp.org/ftp/Specs/html-info/25468.htm
+--
+-- 9.3.5	Common definitions
+--
+-- **************************************************************
+--
+-- Common definitions
+--
+-- **************************************************************
+
+RUA-CommonDataTypes {
+itu-t (0) identified-organization (4) etsi (0) mobileDomain (0) 
+umts-Access (20) modules (3) rua(5) version1 (1) rUA-CommonDataTypes (3)  }
+
+DEFINITIONS AUTOMATIC TAGS ::= 
+
+BEGIN
+
+-- **************************************************************
+--
+-- Extension constants
+--
+-- **************************************************************
+
+maxPrivateIEs 									INTEGER ::= 65535
+maxProtocolExtensions 							INTEGER ::= 65535
+maxProtocolIEs									INTEGER ::= 65535
+
+-- **************************************************************
+--
+-- Common Data Types
+--
+-- **************************************************************
+Criticality		::= ENUMERATED { reject, ignore, notify }
+
+Presence		::= ENUMERATED { optional, conditional, mandatory }
+
+
+ProcedureCode		::= INTEGER (0..255)
+
+PrivateIE-ID	::= CHOICE {
+	local				INTEGER (0..65535),
+	global				OBJECT IDENTIFIER
+}
+
+ProtocolIE-ID		::= INTEGER (0..maxProtocolIEs)
+
+TriggeringMessage	::= ENUMERATED { initiating-message, successful-outcome, unsuccessful-outcome }
+
+END