lldb: avoid mixing "Hit breakpoint" message with other output.

Author: eddyb

src/etc/lldb_batchmode.py

@@ -45,7 +45,10 @@ def normalize_whitespace(s):
 
 def breakpoint_callback(frame, bp_loc, dict):
     """This callback is registered with every breakpoint and makes sure that the
-    frame containing the breakpoint location is selected"""
+    frame containing the breakpoint location is selected """
+
+    # HACK(eddyb) print a newline to avoid continuing an unfinished line.
+    print("")
     print("Hit breakpoint " + str(bp_loc))
 
     # Select the frame and the thread containing it