[Patch] Fix UBSan tests for arm-linux-gnueabi.

[Maxim Ostapenko]

Hi,

I see regressions in some UBSan output pattern tests (bounds-2.c and 
some others) on arm-linux-gnueabi if we use ssh to deliver executables 
to remote target. After some investigation, I discovered, that Dejagnu 
deletes trailing '\n' symbol from output message in this case. My patch 
removes trailing newlines from these tests.

Regested on x86_64-unknown-linux-gnu and arm-linux-gnueabi.

Ok to commit?

-Maxim
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