benchmark: detect libteec offset

Add detection of an offset of load-time relocatable libteec for correct
translation of addresses into file name/line numbers.

Acked-by: Joakim Bech <joakim.bech@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
diff --git a/common.h b/common.h
index a4f3ee9..54cc36c 100644
--- a/common.h
+++ b/common.h
@@ -74,5 +74,6 @@
 #define RING_BADPARM	-1
 #define RING_NODATA		-2
 
+#define LIBTEEC_NAME	"libteec.so"
 #endif /* COMMON.H */