Add csetjmp header

Author: lcartey

cpp/common/test/includes/standard-library/csetjmp

@@ -0,0 +1,12 @@
+#ifndef _GHLIBCPP_CSETJMP
+#define _GHLIBCPP_CSETJMP
+
+#include "setjmp.h"
+
+// C++ std namespace declarations
+namespace std {
+using ::jmp_buf;
+using ::longjmp;
+} // namespace std
+
+#endif // _GHLIBCPP_CSETJMP

cpp/common/test/includes/standard-library/setjmp.h

@@ -1,14 +1,12 @@
 #ifndef _GHLIBCPP_SETJMP
 #define _GHLIBCPP_SETJMP
 
-
-struct __jmp_buf_tag
-  {
-      int x;
-  };
+struct __jmp_buf_tag {
+  int x;
+};
 
 typedef struct __jmp_buf_tag jmp_buf[1];
 
-void longjmp (struct __jmp_buf_tag __env[1], int __val);
-#define  setjmp(env) 0
+[[noreturn]] void longjmp(struct __jmp_buf_tag __env[1], int __val);
+#define setjmp(env) 0
 #endif