Make run_end test wait before responding to some prompts to fix hang

Author: rocallahan

src/test/run_end.py

@@ -4,14 +4,17 @@
 
 # Test that invalid syntax doesn't crash rr
 send_gdb('run run 100')
+expect_gdb('from the beginning')
 send_gdb('y')
+expect_gdb('(rr)')
 send_gdb('break main')
 expect_gdb('Breakpoint 1')
 send_gdb('c')
 expect_gdb('Breakpoint 1')
 
 # Running with a big event number should reach the end of the recording
 send_gdb('run 10000')
+expect_gdb('from the beginning')
 send_gdb('y')
 expect_gdb('SIGKILL')
 send_gdb('c')