Use standard Autoconf macro to detect 'long long' availability and remove now-unused CUPS_LL{CAST, FMT} macros

Using Autoconf's shipped macros is good practice and aids static analysis; quick web searching suggests AC_TYPE_LONG_LONG_INT has been part of Autoconf proper for a very long time.
This Autoconf macro refers to the type as 'long long int', and this isn't objectionable, so change our couple of sources to do the same to match.
'long long' has been mandatory standard since C99 (and hence POSIX.1-2001). In all likelihood this cruft can be dropped altogether, but I'll leave that for another day.

Author: jscott0

configure.ac

@@ -23,14 +23,6 @@ AC_LANG([C++])
 AC_CONFIG_HEADERS([config.h])
 # Extra defines for the config.h
 AH_BOTTOM([
-#ifdef HAVE_LONG_LONG
-#  define CUPS_LLFMT   "%lld"
-#  define CUPS_LLCAST  (long long)
-#else
-#  define CUPS_LLFMT   "%ld"
-#  define CUPS_LLCAST  (long)
-#endif /* HAVE_LONG_LONG */
-
 #ifdef HAVE_ARC4RANDOM
 #  define CUPS_RAND() arc4random()
 #  define CUPS_SRAND(v) arc4random_stir()
@@ -242,10 +234,7 @@ AS_IF([test x"$enable_largefile" != "xno"], [
 ])
 AC_SUBST(LARGEFILE)
 
-AC_CHECK_TYPE(long long, [long_long_found=yes], [long_long_found=no])
-AS_IF([test x"$long_long_found" = "xyes"], [
-	AC_DEFINE([HAVE_LONG_LONG], [], [Platform supports long long type])
-])
+AC_TYPE_LONG_LONG_INT
 
 # =====================================================
 # Check for Ghostscript and PDF-to-PostScript converter

ppd/debug.c

@@ -481,11 +481,11 @@ _ppd_safe_vsnprintf(
 	    if ((size_t)(width + 2) > sizeof(temp))
 	      break;
 
-#  ifdef HAVE_LONG_LONG
+#  ifdef HAVE_LONG_LONG_INT
             if (size == 'L')
 	      snprintf(temp, sizeof(temp), tformat, va_arg(ap, long long));
 	    else
-#  endif // HAVE_LONG_LONG
+#  endif // HAVE_LONG_LONG_INT
             if (size == 'l')
 	      snprintf(temp, sizeof(temp), tformat, va_arg(ap, long));
 	    else

ppd/ppdc-source.cxx

@@ -2279,11 +2279,11 @@ ppdcSource::quotef(cups_file_t *fp,	// I - File to write to
 	    memcpy(tformat, bufformat, (size_t)(format - bufformat));
 	    tformat[format - bufformat] = '\0';
 
-#  ifdef HAVE_LONG_LONG
+#  ifdef HAVE_LONG_LONG_INT
             if (size == 'L')
 	      bytes += cupsFilePrintf(fp, tformat, va_arg(ap, long long));
 	    else
-#  endif // HAVE_LONG_LONG
+#  endif // HAVE_LONG_LONG_INT
             if (size == 'l')
 	      bytes += cupsFilePrintf(fp, tformat, va_arg(ap, long));
 	    else