More printf de-duplication.

Fix the 'j' (intmax_t/uintmax_t) length qualifier in the wide
variant. (With new tests that fail without this fix.)

Fix a typo in the wide support for intmax_t*, which isn't testable because
%n is disabled on Android (and will be removed in a later cleanup pass).

Also move the public vfprintf/vfwprint functions into stdio.cpp.

Bug: http://b/67371539
Test: ran tests
Change-Id: Ib003599b1e9cb789044a068940b59e447f2cb7cb
diff --git a/libc/stdio/vfprintf.cpp b/libc/stdio/vfprintf.cpp
index 6d16828..10303d9 100644
--- a/libc/stdio/vfprintf.cpp
+++ b/libc/stdio/vfprintf.cpp
@@ -83,7 +83,7 @@
   wchar_t* pwchararg;
 };
 
-static int __find_arguments(const char* fmt0, va_list ap, union arg** argtable, size_t* argtablesiz);
+static int __find_arguments(const CHAR_TYPE* fmt0, va_list ap, union arg** argtable, size_t* argtablesiz);
 static int __grow_type_table(unsigned char** typetable, int* tablesize);
 
 /*
@@ -250,16 +250,6 @@
 #define CHARINT 0x0800  /* 8 bit integer */
 #define MAXINT 0x1000   /* largest integer size (intmax_t) */
 
-int vfprintf(FILE* fp, const char* fmt0, __va_list ap) {
-  int ret;
-
-  FLOCKFILE(fp);
-  ret = __vfprintf(fp, fmt0, ap);
-  FUNLOCKFILE(fp);
-  return (ret);
-}
-DEF_STRONG(vfprintf);
-
 int __vfprintf(FILE* fp, const char* fmt0, __va_list ap) {
   char* fmt;           /* format string */
   int ch;              /* character from fmt */