Unversion some symbols for the NDK.

These functions were erroneously released in LIBC_PRIVATE for M, but
in fact need to be public. Since we need to be able to load them on M
even if they were built for a lower platform (and M needs to load on
newer platforms), we need to unversion them.

Change-Id: I333fe8ae7380cc2a5dbd699414399ec52f602383
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index b71739f..8458640 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1226,25 +1226,25 @@
     *;
 };
 
-LIBC_N { # introduced=24
+LIBC_N { # introduced-arm64=24 introduced-mips=24 introduced-mips64=24 introduced-x86=24 introduced-x86_64=24
   global:
-    __aeabi_atexit; # arm
-    __aeabi_memclr; # arm
-    __aeabi_memclr4; # arm
-    __aeabi_memclr8; # arm
-    __aeabi_memcpy; # arm
-    __aeabi_memcpy4; # arm
-    __aeabi_memcpy8; # arm
-    __aeabi_memmove; # arm
-    __aeabi_memmove4; # arm
-    __aeabi_memmove8; # arm
-    __aeabi_memset; # arm
-    __aeabi_memset4; # arm
-    __aeabi_memset8; # arm
+    __aeabi_atexit; # arm versioned=24
+    __aeabi_memclr; # arm versioned=24
+    __aeabi_memclr4; # arm versioned=24
+    __aeabi_memclr8; # arm versioned=24
+    __aeabi_memcpy; # arm versioned=24
+    __aeabi_memcpy4; # arm versioned=24
+    __aeabi_memcpy8; # arm versioned=24
+    __aeabi_memmove; # arm versioned=24
+    __aeabi_memmove4; # arm versioned=24
+    __aeabi_memmove8; # arm versioned=24
+    __aeabi_memset; # arm versioned=24
+    __aeabi_memset4; # arm versioned=24
+    __aeabi_memset8; # arm versioned=24
     __fread_chk; # introduced=24
     __fwrite_chk; # introduced=24
     __getcwd_chk; # introduced=24
-    __gnu_Unwind_Find_exidx; # arm
+    __gnu_Unwind_Find_exidx; # arm versioned=24
     __pwrite_chk; # introduced=24
     __pwrite64_chk; # introduced=24
     __write_chk; # introduced=24