perf build: Add missing -lstdc++ when linking with libopencsd

Add -lstdc++ to perf when linking libopencsd as it is a dependency. It
does not hurt to add it when dynamic linking.
Signed-off-by: Branislav Rankov <branislav.rankov@arm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Brown <Mark.Brown@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: coresight@lists.linaro.org
Cc: nd@arm.com
Link: https://lore.kernel.org/r/e88952b3-2470-da96-dee9-e247a1759cd0@arm.comSigned-off-by: Tamas Zsoldos <tamas.zsoldos@arm.com>
[ Split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile.config

@@ -143,7 +143,7 @@ FEATURE_CHECK_LDFLAGS-libcrypto = -lcrypto
 ifdef CSINCLUDES
   LIBOPENCSD_CFLAGS := -I$(CSINCLUDES)
 endif
-OPENCSDLIBS := -lopencsd_c_api -lopencsd
+OPENCSDLIBS := -lopencsd_c_api -lopencsd -lstdc++
 ifdef CSLIBS
   LIBOPENCSD_LDFLAGS := -L$(CSLIBS)
 endif