Include missing unistd.h for fsync, unlink, getcwd

AMDmi3 · AMDmi3 · commit baac05df495c · 2017-10-28T16:15:18.000+03:00
diff --git a/io_lib/cram_io.c b/io_lib/cram_io.c
@@ -58,6 +58,7 @@
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <zlib.h>
 #ifdef HAVE_LIBBZ2
 #include <bzlib.h>
