Make some of unwanted symbols LIBC_PRIVATE

Bug: http://b/26274444
Change-Id: Ic66f6519a974b72779071235c1d0dd36655fd1b9
diff --git a/libc/libc.mips64.map b/libc/libc.mips64.map
index 8fa46a8..e54bef6 100644
--- a/libc/libc.mips64.map
+++ b/libc/libc.mips64.map
@@ -316,7 +316,6 @@
     fputws;
     fread;
     free;
-    free_malloc_leak_info;
     freeaddrinfo;
     freelocale;
     fremovexattr;
@@ -357,7 +356,6 @@
     fwscanf;
     gai_strerror;
     get_avphys_pages;
-    get_malloc_leak_info;
     get_nprocs;
     get_nprocs_conf;
     get_phys_pages;
@@ -1181,5 +1179,7 @@
 
 LIBC_PRIVATE {
   global:
+    free_malloc_leak_info;
+    get_malloc_leak_info;
     gMallocLeakZygoteChild;
 } LIBC_N;