Add string.h to avoid tst-memstream3 build failure in some environments:
tst-memstream3.c:32:17: error: implicit declaration of function 'strcmp' [-Werror=implicit-function-declaration]
# define STRCMP strcmp
^
tst-memstream3.c:96:7: note: in expansion of macro 'STRCMP'
if (STRCMP (buf, W("b")) != 0)
Checked on x86_64.
* libio/tst-memstream3.c: Include string.h.
+2016-10-02 Adhemerval Zanella <adhemerval.zanella@linaro.org>
+
+ * libio/tst-memstream3.c: Include string.h.
+
2016-09-30 Adhemerval Zanella <adhemerval.zanella@linaro.org>
[BZ #18241]
#include <mcheck.h>
#include <stdio.h>
+#include <string.h>
#include <stdarg.h>
#include <errno.h>