build: Experimental support to build using precompiled headers

This type of build needs to be explicitly enabled using --with-pch
configure option.

Change-Id: I02dc304187d54c3cf40f1d51b1b11b21f868e225
diff --git a/src/security/sec-tpm-osx.cpp b/src/security/sec-tpm-osx.cpp
index ba2464f..27039bf 100644
--- a/src/security/sec-tpm-osx.cpp
+++ b/src/security/sec-tpm-osx.cpp
@@ -5,13 +5,13 @@
  * See COPYING for copyright and distribution information.
  */
 
+#include "common.hpp"
+
 #include "sec-tpm-osx.hpp"
 
 #include "security/public-key.hpp"
 #include "util/logging.hpp"
 
-#include <fstream>
-#include <sstream>
 #include <pwd.h>
 #include <unistd.h>
 #include <stdlib.h>