Ruby » Ruby master

merge revision(s) 39772,39773: [Backport #8080]

    * configure.in: check struct timeval exist or not.

    * include/ruby/missing.h (struct timeval): check HAVE_STRUCT_TIMEVAL
      properly. and don't include sys/time.h if struct timeval exist.

    * file.c: include sys/time.h explicitly.

    * random.c: ditto.

    * thread_pthread.c: ditto.

    * time.c: ditto.

    * ext/date/date_strftime.c: ditto.

    * include/ruby/missing.h (struct timespec): include <sys/time.h>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39838 b2dd03c8-39d4-4d8f-98ff-823fe69b080e