gprs: Attempt to fix distcheck by adding the header file
Due libdbi 0.9.x being broken I didn't run make distcheck and
apparently Jacob has a similar issue and didn't run it either.
diff --git a/openbsc/include/openbsc/Makefile.am b/openbsc/include/openbsc/Makefile.am
index 74e052b..8d989ff 100644
--- a/openbsc/include/openbsc/Makefile.am
+++ b/openbsc/include/openbsc/Makefile.am
@@ -14,7 +14,8 @@
osmo_msc_data.h osmo_bsc_grace.h sms_queue.h abis_om2000.h \
bss.h gsm_data_shared.h ipaccess.h mncc_int.h \
arfcn_range_encode.h nat_rewrite_trie.h bsc_nat_callstats.h \
- osmux.h mgcp_transcode.h rtp.h gprs_utils.h
+ osmux.h mgcp_transcode.h rtp.h gprs_utils.h \
+ gprs_gb_parse.h
openbsc_HEADERS = gsm_04_08.h meas_rep.h bsc_api.h
openbscdir = $(includedir)/openbsc