Explicitly include unistd.h for getpagesize().

Patch by Nico Weber <thakis@chromium.org>

Review URL: https://breakpad.appspot.com/502002/


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1087 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/client/mac/handler/dynamic_images.cc

@@ -41,6 +41,7 @@ extern "C" { // needed to compile on Leopard
 #include <mach/task_info.h>
 #include <sys/sysctl.h>
 #include <TargetConditionals.h>
+#include <unistd.h>
 
 #include <algorithm>
 #include <string>