[Patch] PR55189 enable -Wreturn-type by default

[Sylvestre Ledru]

Hello,

Finally, I have been able to update all tests with -Wreturn-type enabled
by default. AFAIK, under GNU/Linux Debian Jessie 64 bits, there is no
PASS->FAIL tests.

Now, I would like to know if I can commit that into the repository. Who
can review that?

As attachment, you will find the actual (tiny) patch.

I split the tests update by languages. As they are big ( 1260 files
changed, 1638 insertions(+), 903 deletions(-) ), I uploaded the patches
on my server:
http://sylvestre.ledru.info/bordel/patch/0002-Update-Objective-c-tests-with-warning-return-type-en.patch
http://sylvestre.ledru.info/bordel/patch/0003-Update-Fortran-tests-with-warning-return-type-enable.patch
http://sylvestre.ledru.info/bordel/patch/0004-Update-gcc-tests-with-warning-return-type-enabled-by.patch
http://sylvestre.ledru.info/bordel/patch/0005-Update-C-tests-with-warning-return-type-enabled-by-d.patch
http://sylvestre.ledru.info/bordel/patch/0006-Update-OpenMP-tests-with-warning-return-type-enabled.patch

Thanks,
Sylvestre
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