develop/ktcc: Post-SVN tidy

- Move source code from `trunk` into program root directory.
- Update build files and include paths.
- Note: Line endings standardised from `CRLF` > `LF`, so best to view diffs with whitespace changes hidden.

programs/develop/ktcc/libc.obj/source/string/strncpy.c

@@ -0,0 +1,21 @@
+/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
+#include <string.h>
+
+char* strncpy(char* dst, const char* src, size_t n)
+{
+    int d0, d1, d2, d3;
+    __asm__ __volatile__(
+        "1:\tdecl %2\n\t"
+        "js 2f\n\t"
+        "lodsb\n\t"
+        "stosb\n\t"
+        "testb %%al,%%al\n\t"
+        "jne 1b\n\t"
+        "rep\n\t"
+        "stosb\n"
+        "2:"
+        : "=&S"(d0), "=&D"(d1), "=&c"(d2), "=&a"(d3)
+        : "0"(src), "1"(dst), "2"(n)
+        : "memory");
+    return dst;
+}