Add some typedefs to proceed past non-inclusion of header files.

tests/c/00104.c

@@ -1,5 +1,9 @@
 #include <stdint.h>
 
+typedef int int32_t;
+typedef long int64_t;
+
+
 int
 main()
 {

tests/c/00187.c

@@ -1,5 +1,7 @@
 #include <stdio.h>
 
+typedef struct FILE FILE;
+
 int main()
 {
    FILE *f = fopen("fred.txt", "w");

tests/c/00189.c

@@ -1,5 +1,8 @@
 #include <stdio.h>
 
+typedef struct FILE FILE;
+FILE *stdout;
+
 int fred(int p)
 {
    printf("yo %d\n", p);

tests/c/00220.c

@@ -2,6 +2,8 @@
 #include <stdio.h>
 #include <wchar.h>
 
+typedef int wchar_t;
+
 int main()
 {
     wchar_t s[] = L"hello$$你好¢¢世界€€world";