nonblocking-socket-tests: Fix test failure on Android 4.3

[Bruno Haible]

On Android 4.3, I'm seeing this test failure:

FAIL: test-nonblocking-socket.sh
================================

main:1: spent_time = 0.051472, data_block_size too small
FAIL test-nonblocking-socket.sh (exit status: 1)


This patch fixes it.


2019-01-26  Bruno Haible  <address@hidden>

        nonblocking-socket-tests: Fix test failure on Android 4.3.
        * tests/test-nonblocking-socket.h (SOCKET_HAS_LARGE_BUFFER): Define to 1
        also on Android.

diff --git a/tests/test-nonblocking-socket.h b/tests/test-nonblocking-socket.h
index f049300..c3f9f54 100644
--- a/tests/test-nonblocking-socket.h
+++ b/tests/test-nonblocking-socket.h
@@ -21,6 +21,7 @@
      Platform                        SOCKET_DATA_BLOCK_SIZE
 
      Linux                           >= 7350000 (depends on circumstances)
+     Linux/Android                   >= 1700000 (approx.)
      FreeBSD                         >= 107521
      OpenBSD                         >= 106430 (depends on circumstances)
      Mac OS X                        >= 680000 (depends on circumstances)
@@ -44,7 +45,7 @@
    sockets have very large buffers in the kernel, so that write() calls
    succeed before the reader has started reading, even if fd is blocking
    and the amount of data is larger than 1 MB.  */
-#if defined __linux__ || (defined __APPLE__ && defined __MACH__) || defined 
_WIN32 || defined __CYGWIN__
+#if defined __linux__ || defined __ANDROID__ || (defined __APPLE__ && defined 
__MACH__) || defined _WIN32 || defined __CYGWIN__
 # define SOCKET_HAS_LARGE_BUFFER 1
 #else
 # define SOCKET_HAS_LARGE_BUFFER 0