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/fcntl.cc

@@ -20,8 +20,7 @@ details. */
 #include "cygheap.h"
 #include "thread.h"
 
-extern "C"
-int
+extern "C" int
 _fcntl (int fd, int cmd,...)
 {
   void *arg = NULL;