TCF Agent: update breakpoint error message

update error msg to be more user actionable.
diff --git a/agent/tcf/services/breakpoints.c b/agent/tcf/services/breakpoints.c
index a32d8f4..ac28c36 100644
--- a/agent/tcf/services/breakpoints.c
+++ b/agent/tcf/services/breakpoints.c
@@ -1977,7 +1977,7 @@
                 bp_location_error = errno;
             }
             else if (bp_line_cnt == 0) {
-                bp_location_error = set_errno(ERR_OTHER, "Unresolved source line information");
+                bp_location_error = set_errno(ERR_OTHER, "No debug information for this source line, check your compiler options");
             }
             else if (bp_stmt_cnt == 0) {
                 unsigned i;