[binutils-gdb] Handle memory write errors on gdb.base/break-always.exp

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT ecbf2b3c4f5ee6c00cf058b87fa49708d4030d7f ***

Author: Luis Machado <lgustavo@codesourcery.com>
Branch: master
Commit: ecbf2b3c4f5ee6c00cf058b87fa49708d4030d7f

Handle memory write errors on gdb.base/break-always.exp
This is another case of the testcase not handling memory write errors that
happen on some targets (QEMU) when GDB attempts to modify an address that
should contain a breakpoint, for example.

The following patch handles this and prevents spurious failures from
happening. It also adds a foreach loop to avoid duplication of code
and hardcoded patterns.

gdb/testsuite/ChangeLog:

2015-04-29  Luis Machado  <lgustavo@codesourcery.com>

	* gdb.base/break-always.exp: Abort testing if writing to memory
	causes an error.