[master] add missing LDADD to benchmark makefile

src/lib/datasrc/memory/benchmarks/Makefile.am

@@ -14,4 +14,5 @@ noinst_PROGRAMS = rdata_reader_bench
 rdata_reader_bench_SOURCES = rdata_reader_bench.cc
 
 rdata_reader_bench_LDADD = $(top_builddir)/src/lib/datasrc/memory/libdatasrc_memory.la
+rdata_reader_bench_LDADD += $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
 rdata_reader_bench_LDADD += $(top_builddir)/src/lib/dns/libb10-dns++.la