DO NOT MERGE: The future is now.

__INTRODUCED_IN_FUTURE -> __INTRODUCED_IN(26)

Bug: http://b/37437368
Test: treehugger
Change-Id: I601a23da83b65a0cd582cc840ed3856a9031b673
(cherry picked from commit cb302f932a3532f1484e1e70894e9b1199384283)
diff --git a/libc/include/fcntl.h b/libc/include/fcntl.h
index 2d01be7..652430c 100644
--- a/libc/include/fcntl.h
+++ b/libc/include/fcntl.h
@@ -91,7 +91,7 @@
 
 #if defined(__USE_GNU)
 ssize_t readahead(int, off64_t, size_t) __INTRODUCED_IN(16);
-int sync_file_range(int, off64_t, off64_t, unsigned int) __INTRODUCED_IN_FUTURE;
+int sync_file_range(int, off64_t, off64_t, unsigned int) __INTRODUCED_IN(26);
 #endif
 
 int __open_2(const char*, int) __INTRODUCED_IN(17);