[newlib-cygwin/main] Cygwin: add fastcwd to AArch64 build

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=843372d5dfa276eb7de8df63a7f1ecbab542fdf1

commit 843372d5dfa276eb7de8df63a7f1ecbab542fdf1
Author:     Radek Bartoň <radek.barton@microsoft.com>
AuthorDate: Mon Jun 9 13:07:01 2025 +0200
Commit:     Corinna Vinschen <corinna@vinschen.de>
CommitDate: Thu Jul 3 17:15:17 2025 +0200

    Cygwin: add fastcwd to AArch64 build
    
    Signed-off-by: Radek Bartoň <radek.barton@microsoft.com>

Diff:
---
 winsup/cygwin/Makefile.am | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/winsup/cygwin/Makefile.am b/winsup/cygwin/Makefile.am
index 31747ac98ca9..90a7332a8fbf 100644
--- a/winsup/cygwin/Makefile.am
+++ b/winsup/cygwin/Makefile.am
@@ -64,6 +64,11 @@ TARGET_FILES= \
 	x86_64/wmempcpy.S
 endif
 
+if TARGET_AARCH64
+TARGET_FILES= \
+	aarch64/fastcwd.cc
+endif
+
 # These objects are included directly into the import library
 LIB_FILES= \
 	lib/_cygwin_crt0_common.cc \