Fix missing include and signature mismatch on gentoo linux

hw/kdrive/fbdev/fbinit.c

@@ -54,7 +54,7 @@ ddxInputThreadInit(void)
 #endif
 
 void
-InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
+InitOutput(int argc, char **argv)
 {
     if (serverGeneration == 1)
         ephyrExtensionInit();

hw/kdrive/src/kinput.c

@@ -32,6 +32,7 @@
 #include <X11/XF86keysym.h>
 #endif
 #include <stdio.h>
+#include <signal.h>
 #include <sys/file.h>           /* needed for FNONBLOCK & FASYNC */
 
 #include <X11/extensions/XI.h>