Add copy_file_range(2) syscall stub to bionic.

Test: treehugger
Bug: https://buganizer.corp.google.com/issues/227784687
Change-Id: I543306cd2234189401bf7c9d80d405eeb6e4d41d
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index 1435e79..45b2a1b 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -108,6 +108,7 @@
 
 int         __close:close(int)  all
 int         close_range(unsigned int, unsigned int, int) all
+ssize_t     copy_file_range(int, off64_t*, int, off64_t*, size_t, unsigned int) all
 pid_t       __getpid:getpid()  all
 int memfd_create(const char*, unsigned) all
 int         munmap(void*, size_t)  all