Add some prototypes to fix -Wstrict-prototypes. NFC

Author: MaskRay

libunwind/src/cet_unwind.h

@@ -36,6 +36,6 @@
 #endif
 
 extern void *__libunwind_cet_get_registers(unw_cursor_t *);
-extern void *__libunwind_cet_get_jump_target();
+extern void *__libunwind_cet_get_jump_target(void);
 
 #endif

libunwind/src/config.h

@@ -188,9 +188,9 @@
   #ifdef __cplusplus
     extern "C" {
   #endif
-    extern  bool logAPIs();
-    extern  bool logUnwinding();
-    extern  bool logDWARF();
+    extern  bool logAPIs(void);
+    extern  bool logUnwinding(void);
+    extern  bool logDWARF(void);
   #ifdef __cplusplus
     }
   #endif