Description:
------------
when setting up the ci environment, I noticed, that passing the REPORT_EXIT_STATUS 
environment variable to run-tests.php works, but passing the same thing to make 
test won't.
after some debugging with Hannes, we figured out, that the test target in the 
Makefile overuses the error suppression 
operator(http://sunsite.ualberta.ca/Documentation/Gnu/make-
3.79/html_chapter/make_5.html#SEC48).
if you check the test target (http://svn.php.net/viewvc/php/php-
src/trunk/Makefile.global?view=markup#l88) you can see that the whole target is a 
one-liner prefixed with -
which means that anything can fail in the target, it will still report success. :/

the same pattern is used for many of the targets.
Could somebody look into this?

Test script:
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REPORT_EXIT_STATUS=1 make test;
echo $?;

Expected result:
----------------
should print non-zero if there are failed tests.

Actual result:
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always prints 0