8265018: [AIX] FileDispatcherImpl.c:31:10: fatal error: 'sys/mount.h' file not found

Reviewed-by: clanger

Author: TheRealMDoerr

src/java.base/unix/native/libnio/ch/FileDispatcherImpl.c

@@ -28,8 +28,10 @@
 #include <fcntl.h>
 #include <sys/uio.h>
 #include <unistd.h>
+#ifdef MACOSX
 #include <sys/mount.h>
 #include <sys/param.h>
+#endif
 #include <sys/stat.h>
 #include <sys/statvfs.h>