ld-plugin/pr24406-1.c: Correct buffer size to read

* testsuite/ld-plugin/pr24406-1.c (main): Correct buffer size
	to read.

ld/ChangeLog

@@ -1,3 +1,8 @@
+2019-09-23  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* testsuite/ld-plugin/pr24406-1.c (main): Correct buffer size
+	to read.
+
 2019-09-23  Alan Modra  <amodra@gmail.com>
 
 	* deffilep.y: Include bfdlink.h.

ld/testsuite/ld-plugin/pr24406-1.c

@@ -12,6 +12,6 @@ __wrap_read (int fd, void *buffer, size_t count)
 int
 main ()
 {
-  int i = read (1, "abc", 5);
+  int i = read (1, "abc", 4);
   return i == 0;
 }