Show all tests on AppVeyor

This is a temporary measure to try to resolve the often failing
mysqli_insert_packet_overflow.phpt issue.  Unfortunately, I have not
been able to reproduce the test failure locally, or in my php-src fork.

Author: cmb69

appveyor/test_task.bat

@@ -96,7 +96,7 @@ mkdir c:\tests_tmp
 set TEST_PHP_JUNIT=c:\junit.out.xml
 
 cd "%APPVEYOR_BUILD_FOLDER%"
-nmake test TESTS="%OPCACHE_OPTS% -q --offline --show-diff --show-slow 1000 --set-timeout 120 -g FAIL,XFAIL,BORK,WARN,LEAK,SKIP --temp-source c:\tests_tmp --temp-target c:\tests_tmp %PARALLEL%"
+nmake test TESTS="%OPCACHE_OPTS% -q --offline --show-diff --show-slow 1000 --set-timeout 120 --temp-source c:\tests_tmp --temp-target c:\tests_tmp %PARALLEL%"
 
 set EXIT_CODE=%errorlevel%