C89-compliant quines

From-SVN: r26768

gcc/pself4.c

+#include <stdio.h>
+int main(void){char*p="#include <stdio.h>%cint main(void){char*p=%c%s%c;(void)printf(p,10,34,p,34,10);return 0;}%c";(void)printf(p,10,34,p,34,10);return 0;}

gcc/pself5.c

+#include <stdio.h>
+#define N '\n'
+#define Q '\"'
+#define B '\\'
+int main(void){char*p="#include <stdio.h>%c#define N '%cn'%c#define Q '%c%c'%c#define B '%c%c'%cint main(void){char*p=%c%s%c;(void)printf(p,N,B,N,B,Q,N,B,B,N,Q,p,Q,N);return 0;}%c";(void)printf(p,N,B,N,B,Q,N,B,B,N,Q,p,Q,N);return 0;}