Windows all-stop, interrupt with "stopped" instead of SIGTRAP

Windows all-stop, interrupt with "stopped" instead of SIGTRAP

Before:

 (gdb) c&
 Continuing.
 ...
 (gdb) info threads
   Id   Target Id          Frame
 * 1    Thread 1180.0x1374 (running)
   2    Thread 1180.0xc3c  (running)
   3    Thread 1180.0x6ec  (running)
   5    Thread 1180.0x1378 (running)
 (gdb)
 ...
 [New Thread 1180.0xc70]
 [Thread 1180.0x1378 exited with code 0]
 [Thread 1180.0xc70 exited with code 0]
 [New Thread 1180.0xdc0]
 ...
 interrupt
 (gdb) [New Thread 1180.0x1010]

 Thread 8 received signal SIGTRAP, Trace/breakpoint trap.
 [Switching to Thread 1180.0x1010]
 0x00007ffa57490b71 in ntdll!DbgBreakPoint () from C:\Windows\SYSTEM32\ntdll.dll
 info threads
   Id   Target Id          Frame
   1    Thread 1180.0x1374 0x00007ffa5748d6e4 in ntdll!ZwDelayExecution () from C:\Windows\SYSTEM32\ntdll.dll
   2    Thread 1180.0xc3c  0x00007ffa57490ad4 in ntdll!ZwWaitForWorkViaWorkerFactory () from C:\Windows\SYSTEM32\ntdll.dll
   3    Thread 1180.0x6ec  0x00007ffa5748d6e4 in ntdll!ZwDelayExecution () from C:\Windows\SYSTEM32\ntdll.dll
   7    Thread 1180.0xdc0  0x00007ffa5748d6e4 in ntdll!ZwDelayExecution () from C:\Windows\SYSTEM32\ntdll.dll
 * 8    Thread 1180.0x1010 0x00007ffa57490b71 in ntdll!DbgBreakPoint () from C:\Windows\SYSTEM32\ntdll.dll
 (gdb)

After:

 (gdb) info threads
   Id   Target Id          Frame
 * 1    Thread 5912.0x394  (running)
   2    Thread 5912.0x608  (running)
   3    Thread 5912.0x1704 (running)
   10   Thread 5912.0x870  (running)
 (gdb)
 ...
 [Thread 5912.0x870 exited with code 0]
 ...
 (gdb) interrupt
 (gdb)
 Thread 1 stopped.
 0x00007ffa5748d6e4 in ntdll!ZwDelayExecution () from C:\Windows\SYSTEM32\ntdll.dll
 info threads
   Id   Target Id          Frame
 * 1    Thread 5912.0x394  0x00007ffa5748d6e4 in ntdll!ZwDelayExecution () from C:\Windows\SYSTEM32\ntdll.dll
   2    Thread 5912.0x608  0x00007ffa57490ad4 in ntdll!ZwWaitForWorkViaWorkerFactory () from C:\Windows\SYSTEM32\ntdll.dll
   3    Thread 5912.0x1704 0x00007ffa5748d6e4 in ntdll!ZwDelayExecution () from C:\Windows\SYSTEM32\ntdll.dll
   8    Thread 5912.0x1200 0x00007ffa5748d6e4 in ntdll!ZwDelayExecution () from C:\Windows\SYSTEM32\ntdll.dll
 (gdb)

Change-Id: I569fc69392ce9a070a2ebe1003388b7386412b14