Breakpad: Avoid using the C++ <cfoo> headers.

This patch avoids unnecessary use of the <cfoo> headers in files that don't
actually use the identifiers they declare in the std:: namespace.

It also changes some files to better conform with the "Names and Order of
Includes" rules in the Google C++ Style Guide.

A=jimb R=mark

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@619 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/testdata/linux_test_app.cc

@@ -39,9 +39,10 @@
 // generate an executable with STABS symbols (needs -m32), or -gdwarf-2 for one
 // with DWARF symbols (32- or 64-bit)
 
+#include <stdio.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include <cstdio>
+
 #include <string>
 
 #include "common/linux/linux_syscall_support.h"

src/processor/testdata/test_app.cc

@@ -32,7 +32,7 @@
 //   google_breakpad/src/client/windows/releasestaticcrt/exception_handler.lib
 // Then run test_app to generate a dump, and dump_syms to create the .sym file.
 
-#include <cstdio>
+#include <stdio.h>
 
 #include "client/windows/handler/exception_handler.h"