Move mallopt to correct section.

Bug: 62202823

Test: Built and built unit tests.
Change-Id: Icefc152eb756fd60ce8f51d694f22923a41a9cd1
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index b32f769..a4212dd 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -1279,6 +1279,7 @@
     getsubopt; # introduced=26
     hasmntopt; # introduced=26
     lutimes; # introduced=26
+    mallopt; # introduced=26
     mblen; # introduced=26
     msgctl; # introduced=26
     msgget; # introduced=26
@@ -1553,5 +1554,4 @@
     malloc_disable;
     malloc_enable;
     malloc_iterate;
-    mallopt;
 } LIBC_O;