Fix API level of cfi_* symbols to 27

API level of O-MR1 is 27.

Bug: 63053790
Test: bionic tests passes

Change-Id: I78f0bd8af106954326394d60bf4d0cf5e10f7f17
diff --git a/libdl/libdl.arm.map b/libdl/libdl.arm.map
index 9fc9d23..628e20d 100644
--- a/libdl/libdl.arm.map
+++ b/libdl/libdl.arm.map
@@ -34,11 +34,11 @@
     dlvsym; # introduced=24
 } LIBC;
 
-LIBC_OMR1 { # future
+LIBC_OMR1 { # introduced=27
   global:
-    __cfi_shadow_size; # future
-    __cfi_slowpath; # future
-    __cfi_slowpath_diag; # future
+    __cfi_shadow_size; # introduced=27
+    __cfi_slowpath; # introduced=27
+    __cfi_slowpath_diag; # introduced=27
 } LIBC_N;
 
 LIBC_PLATFORM {