add gsm0341_test to generate SMSCB hex strings

Those hex strings can then be copy+pasted into the OSmoNITB VTY
diff --git a/include/Makefile.am b/include/Makefile.am
index 149e29f..9aba377 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -52,6 +52,7 @@
                        osmocom/gsm/comp128.h \
                        osmocom/gsm/comp128v23.h \
                        osmocom/gsm/gan.h \
+                       osmocom/gsm/gsm0341.h \
                        osmocom/gsm/gsm0411_smc.h \
                        osmocom/gsm/gsm0411_smr.h \
                        osmocom/gsm/gsm0411_utils.h \