FROMLIST: add SEEK_DATA and SEEK_HOLE to <unistd.h> am: a0849602dd am: a2acbcd86e

Original change: https://android-review.googlesource.com/c/platform/external/musl/+/1969741

Change-Id: I4c5472be25934ce691b12fdb26c589019d7139cf
diff --git a/include/unistd.h b/include/unistd.h
index ee2dbe8..212263a 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -14,6 +14,8 @@
 #define SEEK_SET 0
 #define SEEK_CUR 1
 #define SEEK_END 2
+#define SEEK_DATA 3
+#define SEEK_HOLE 4
 
 #if __cplusplus >= 201103L
 #define NULL nullptr