issue 238 - missing includes compiling with gcc 4.3. patch by taras glek, r=me

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@240 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/client/linux/handler/exception_handler.cc

@@ -37,6 +37,7 @@
 #include <cassert>
 #include <cstdlib>
 #include <ctime>
+#include <linux/limits.h>
 
 #include "client/linux/handler/exception_handler.h"
 #include "common/linux/guid_creator.h"

src/client/linux/handler/linux_thread.cc

@@ -37,6 +37,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 #include <sys/wait.h>
+#include <string.h>
 
 #include <algorithm>
 #include <cassert>

src/client/linux/handler/minidump_generator.cc

@@ -40,6 +40,7 @@
 
 #include <cstdlib>
 #include <ctime>
+#include <string.h>
 
 #include "common/linux/file_id.h"
 #include "client/linux/handler/linux_thread.h"