Fix missing os::print_signal_handlers on Windows, white space on Linux

Author: gerard-ziemski

src/hotspot/os/windows/os_windows.cpp

@@ -1872,6 +1872,10 @@ bool os::signal_thread(Thread* thread, int sig, const char* reason) {
   return false;
 }
 
+void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
+  // do nothing
+}
+
 static char saved_jvm_path[MAX_PATH] = {0};
 
 // Find the full path to the current module, jvm.dll

src/hotspot/os_cpu/linux_ppc/os_linux_ppc.cpp

@@ -406,7 +406,7 @@ bool PosixSignals::pd_hotspot_signal_handler(int sig, siginfo_t* info,
     os::Posix::ucontext_set_pc(uc, stub);
     return true;
   }
-  
+
   return false;
 }