Initial handling support for RIM messages

This code doesn't do anything yet app-related with the received RIM
messages, but already provides the initial infrastructure to handle them
in the future, and does first checkings.

Related: SYS#5103
Change-Id: Ia0ade0e97ea781ec655439c008b6cefaf3e90dec
diff --git a/src/Makefile.am b/src/Makefile.am
index de924a6..f85a456 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -43,6 +43,7 @@
 	csn1.c \
 	gsm_rlcmac.c \
 	gprs_bssgp_pcu.c \
+	gprs_bssgp_rim.c \
 	gprs_rlcmac.cpp \
 	gprs_rlcmac_sched.cpp \
 	gprs_rlcmac_meas.cpp \
@@ -81,6 +82,7 @@
 	csn1.h \
 	gsm_rlcmac.h \
 	gprs_bssgp_pcu.h \
+	gprs_bssgp_rim.h \
 	gprs_rlcmac.h \
 	gprs_ms.h \
 	gprs_ms_storage.h \