[libc] Move implementations of strcat and strcpy to the string directory.

Summary:
Now that tests live in separate top-level directory, keeping the
implementations of individual functions in a directory of their own is
not meaningful. Hence, this change moves them into the higher level
string directory.

NFC intended.

Reviewers: MaskRay

Subscribers: mgorny, tschuett, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D72295

1 files changed, 20 insertions, 0 deletions

diff --git a/libc/src/string/strcat.h b/libc/src/string/strcat.h
new file mode 100644
index 00000000000..d3023e9757c
--- /dev/null
+++ b/libc/src/string/strcat.h
@@ -0,0 +1,20 @@
+//===----------------- Implementation header for strcat -------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_STRING_STRCAT_H
+#define LLVM_LIBC_SRC_STRING_STRCAT_H
+
+#include <string.h>
+
+namespace __llvm_libc {
+
+char *strcat(char *dest, const char *src);
+
+} // namespace __llvm_libc
+
+#endif // LLVM_LIBC_SRC_STRING_STRCAT_H