config: Try to use stdint.h with Borland C.

(This probably isn't right on truly ancient versions of Borland C, but it
should cover things from the last decade or so, I hope.)

(possibly) Fixes #1673.

include/SDL_config.h.cmake

@@ -509,7 +509,7 @@ typedef unsigned long uintptr_t;
 #  endif /* if (stdint.h isn't available) */
 #else /* __WIN32__ */
 #  if !defined(_STDINT_H_) && !defined(HAVE_STDINT_H) && !defined(_HAVE_STDINT_H)
-#    if defined(__GNUC__) || defined(__DMC__) || defined(__WATCOMC__)
+#    if defined(__GNUC__) || defined(__DMC__) || defined(__WATCOMC__) || defined(__BORLANDC__) || defined(__CODEGEARC__)
 #define HAVE_STDINT_H	1
 #    elif defined(_MSC_VER)
 typedef signed __int8 int8_t;

include/SDL_config_windows.h

@@ -28,7 +28,7 @@
 /* This is a set of defines to configure the SDL features */
 
 #if !defined(_STDINT_H_) && (!defined(HAVE_STDINT_H) || !_HAVE_STDINT_H)
-#if defined(__GNUC__) || defined(__DMC__) || defined(__WATCOMC__) || defined(__clang__)
+#if defined(__GNUC__) || defined(__DMC__) || defined(__WATCOMC__) || defined(__clang__) || defined(__BORLANDC__) || defined(__CODEGEARC__)
 #define HAVE_STDINT_H   1
 #elif defined(_MSC_VER)
 typedef signed __int8 int8_t;