Deprecate bzero

bzero is hashdefined to memset in strings.h and it
was removed from POSIX 2008.

Bug: http://b/26407170
Change-Id: Ia6d54f0e314dc7f5f3fbad0e9b00344f49f77d43
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index a75bdc2..c9d9fe8 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -274,7 +274,6 @@
     brk;
     bsearch;
     btowc;
-    bzero; # arm x86 mips
     c16rtomb;
     c32rtomb;
     cacheflush; # arm mips
@@ -1427,6 +1426,7 @@
     arc4random_stir; # arm x86 mips nobrillo
     atexit; # arm
     bcopy; # arm x86 mips nobrillo
+    bzero; # arm x86 mips nobrillo
     bsd_signal; # arm x86 mips nobrillo
     dlmalloc; # arm x86 mips nobrillo
     dlmalloc_inspect_all; # arm x86 mips nobrillo