import gsup_client.c as new libosmo-gsup-client

This imports the code from osmo-msc 6afef893e17bce67e4d4119acd34d480ed03ba77
with minimal changes to make it compile.  Symbol renaming ot osmo_
prefix is done separately in a follow-up patch to have a as-clean-as-possible
import first.

Requires: libosmocore.git Change-Id Ie36729996abd30b84d1c30a09f62ebc6a9794950
Change-Id: Ief50054ad135551625b684ed8a0486f7af0b2940
diff --git a/include/Makefile.am b/include/Makefile.am
new file mode 100644
index 0000000..dac7011
--- /dev/null
+++ b/include/Makefile.am
@@ -0,0 +1,2 @@
+nobase_include_HEADERS = osmocom/gsupclient/gsup_client.h
+