endian: Fixed Linux compilation issues

Having files named endian.[c|h] seemed to cause issues under Linux so
renamed them both to have the curl_ prefix in the filenames.

lib/curl_endian.h

@@ -0,0 +1,43 @@
+#ifndef HEADER_CURL_ENDIAN_H
+#define HEADER_CURL_ENDIAN_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+/* Converts a 16-bit integer from little endian */
+unsigned short Curl_read16_le(unsigned char *buf);
+
+/* Converts a 32-bit integer from little endian */
+unsigned int Curl_read32_le(unsigned char *buf);
+
+/* Converts a 32-bit integer to little endian */
+void Curl_write32_le(const int value, unsigned char *buffer);
+
+#if (CURL_SIZEOF_CURL_OFF_T > 4)
+/* Converts a 64-bit integer to little endian */
+#if defined(HAVE_LONGLONG)
+void Curl_write64_le(const long long value, unsigned char *buffer);
+#else
+void Curl_write64_le(const __int64 value, unsigned char *buffer);
+#endif
+#endif
+
+#endif /* HEADER_CURL_ENDIAN_H */