[binutils-gdb] Add a missing break in record_linux_system_call

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 449b1ac7ad5f3da9ef689c91144aa057cb253df6 ***

Author: Tom Tromey <tom@tromey.com>
Branch: master
Commit: 449b1ac7ad5f3da9ef689c91144aa057cb253df6

Add a missing break in record_linux_system_call

This adds a "break" at the end of the RECORD_SYS_RECVFROM case in
record_linux_system_call.  This seemed correct to me.

2018-05-04  Tom Tromey  <tom@tromey.com>

	* linux-record.c (record_linux_system_call) <case
	RECORD_SYS_RECVFROM>: Add "break".