Commits on Mar 26, 2017

1. tests: fix build failure on gcc-6.3 / glibc-2.25 (open) …

   Recent gcc has a mechanism to detect some function misuses
   at compile-time. In this case it's a case when open() is
   likely to create new file but access permissions are not set
   explicitly:
   
       $  LANG=C make -C tests api-tests
       gcc -g2 -O2 -Wall -fno-omit-frame-pointer -DHAVE_CONFIG_H  -DLINUX  -I.. -I../include   -c -o api/fsio.o api/fsio.c
       In file included from /usr/include/fcntl.h:313:0,
                        from /usr/include/sys/file.h:24,
                        from ../include/conf.h:93,
                        from api/tests.h:30,
                        from api/fsio.c:27:
       In function 'open',
           inlined from 'fsio_sys_access_file_test' at api/fsio.c:1059:6:
       /usr/include/bits/fcntl2.h:50:4: error: call to '__open_missing_mode' declared with attribute error: open with O_CREAT or O_TMPFILE in second argument needs 3 arguments
           __open_missing_mode ();
           ^~~~~~~~~~~~~~~~~~~~~~
       make: *** [<builtin>: api/fsio.o] Error 1
   
   The change adds "u=rw" to all temp files.
   
   Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

   Sergei Trofimovich committed Mar 26, 2017
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