Define MAXHOSTNAMELEN explicitly in source files.

Bug: 19093777
Bug: 19092844
Change-Id: I0778507ca2d5c008abb9a6d6315d0909263a8817

libc/kernel/tools/defaults.py

@@ -118,10 +118,8 @@ kernel_known_statics = {
 # the generated files.
 #
 kernel_ignored_macros = set(
-        [ "MAXHOSTNAMELEN",  # for some reason, Linux defines it to 64
-                             # while most of the BSD code expects this to be 256
-                             # so ignore the kernel-provided definition and
-                             # define it in the Bionic headers instead
+        [
+
         ]
     )
 

libc/kernel/uapi/asm-generic/param.h

@@ -29,5 +29,6 @@
 #ifndef NOGROUP
 #define NOGROUP (- 1)
 #endif
-#endif
+#define MAXHOSTNAMELEN 64
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif