develop/ktcc: Post-SVN tidy

- Move source code from `trunk` into program root directory.
- Update build files.

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

@@ -0,0 +1,14 @@
+#include <string.h>
+
+void *memccpy(void *restrict dest, const void *restrict src, int c, size_t n)
+{
+	unsigned char *d = dest;
+	const unsigned char *s = src;
+
+	c = (unsigned char)c;
+	for (; n && (*d=*s)!=c; n--, s++, d++);
+
+tail:
+	if (n) return d+1;
+	return 0;
+}