[perl #41502] [PATCH] fix auto::sizes configure step

[Aldo Calpini]

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this little patch adds a final \n to the test_c.in and test2_c.in files
in config/auto/sizes. the fix is needed for the cegcc platform, cfr.
"Porting parrot on PDA", because the cegcc compiler doesn't output the
last line at all unless it has a terminating newline. (and then,
terminating with a newline seems a good practice anyway).

this shouldn't break anything for other platforms. at least it doesn't
break for cygwin.

cheers,
Aldo