libarchive: Disable Borland warnings

We disable warnings to silence them while making minimal changes to
third-party code.

Utilities/cmlibarchive/libarchive/archive_private.h

@@ -35,6 +35,19 @@
 #include "archive.h"
 #include "archive_string.h"
 
+#if defined(__BORLANDC__)
+# pragma warn -8004 /* Assigned value never used.  */
+# pragma warn -8008 /* Condition is always true/false.  */
+# pragma warn -8012 /* Compare signed/unsigned.  */
+# pragma warn -8053 /* Called function is obsolete.  */
+# pragma warn -8057 /* Unused parameter.  */
+# pragma warn -8060 /* Possibly incorrect assignment.  */
+# pragma warn -8065 /* Call to function without prototype.  */
+# pragma warn -8066 /* Unreachable code.  */
+# pragma warn -8068 /* Constant out of range in comparison.  */
+# pragma warn -8072 /* Suspicious pointer arithmetic.  */
+#endif
+
 #if defined(_MSC_VER)
 # pragma warning (push,1)
 #endif

Utilities/cmlibarchive/libarchive/archive_windows.c

@@ -47,6 +47,7 @@
 #if defined(_WIN32) && !defined(__CYGWIN__)
 
 #include "archive_platform.h"
+#include "archive_private.h"
 #include <ctype.h>
 #include <errno.h>
 #include <stddef.h>

Utilities/cmlibarchive/libarchive/filter_fork_windows.c

@@ -24,6 +24,7 @@
  */
 
 #include "archive_platform.h"
+#include "archive_private.h"
 
 #if defined(_WIN32) && !defined(__CYGWIN__)