Rename <openssl/time.h> to <openssl/posix_time.h>

There's a desire to upstream this in a compatible way to other
projects so they can use the same public API as us, however for
some C based build systems having an include file potentially
on the include path that can end up being picked up when you
include <time.h> is problematic and annoying, so let's
just avoid the unnecessary pain.

Update-Note: <openssl/time.h> has moved to <openssl/posix_time.h>

Change-Id: I7c6aa92e95a10ff65275851fcf596b06e4848789
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/65847
Commit-Queue: Bob Beck <bbe@google.com>
Auto-Submit: Bob Beck <bbe@google.com>
Reviewed-by: David Benjamin <davidben@google.com>

util/doc.config

diff --git a/util/doc.config b/util/doc.config
index 29bba67..d2bc500 100644
--- a/util/doc.config
+++ b/util/doc.config
@@ -14,9 +14,9 @@
       "include/openssl/mem.h",
       "include/openssl/obj.h",
       "include/openssl/pool.h",
+      "include/openssl/posix_time.h",
       "include/openssl/rand.h",
-      "include/openssl/stack.h",
-      "include/openssl/time.h"
+      "include/openssl/stack.h"
     ]
   },{
     "Name": "Low-level crypto primitives",