[master] set library version

make sure use the correct version of libdatasrc.

Error was:
Undefined symbol "_ZN3isc7datasrc35DATASRC_SQLITE_INCOMPATIBLE_VERSIONE"

Discussed on jabber.

src/lib/datasrc/Makefile.am

@@ -31,6 +31,7 @@ libdatasrc_la_SOURCES += client.h iterator.h
 libdatasrc_la_SOURCES += database.h database.cc
 libdatasrc_la_SOURCES += factory.h factory.cc
 nodist_libdatasrc_la_SOURCES = datasrc_messages.h datasrc_messages.cc
+libdatasrc_la_LDFLAGS = -no-undefined -version-info 1:0:1
 
 pkglib_LTLIBRARIES =  sqlite3_ds.la memory_ds.la