add BSSMAP-LE coding for Location Services

BSSMAP-LE: add Lb-interface messages between BSC and SMLC:
- Reset
- Reset Acknowledge
- Perform Location Request, possibly containing BSSLAP TA Layer3
- Perform Location Response
- Perform Location Abort
- Connection Oriented Information containing any BSSLAP APDU

Add encoding and decoding tests.

Change-Id: I271e59b794bafc0a7ae0eabbf58918f6d7df431d
diff --git a/include/Makefile.am b/include/Makefile.am
index 19d4043..90f448a 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -93,6 +93,7 @@
                        osmocom/coding/gsm0503_coding.h \
                        osmocom/coding/gsm0503_amr_dtx.h \
                        osmocom/gsm/bsslap.h \
+                       osmocom/gsm/bssmap_le.h \
                        osmocom/gsm/gad.h \
                        osmocom/gsm/gsm0808.h \
                        osmocom/gsm/gsm29205.h \