Do some minor reformatting of 'extern "C"' use throughout.

* autoload.cc (GetSystemTimes): Define new autoload function.
* fhandler_proc.cc (proc_listing): Add cpuinfo and partitions entries.
(fhandler_proc::fill_filebuf): Add PROC_CPUINFO and PROC_PARTITIONS cases.
(format_proc_uptime): Use GetSystemTimes if available.
(read_value): New macro.
(print): New macro.
(cpuid): New function.
(can_set_flag): New function.
(format_proc_cpuinfo): New function.
(format_proc_partitions): New function.

winsup/cygwin/select.cc

@@ -95,8 +95,7 @@ typedef long fd_mask;
 
 /* The main select code.
  */
-extern "C"
-int
+extern "C" int
 cygwin_select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
 	       struct timeval *to)
 {