Merge branch 'js/windows-arm64'

Update to arm64 Windows port.

* js/windows-arm64:
  max_tree_depth: lower it for clangarm64 on Windows
  mingw(arm64): do move the `/etc/git*` location
  msvc: do handle builds on Windows/ARM64
  mingw: do not use nedmalloc on Windows/ARM64
  config.mak.uname: add support for clangarm64
  bswap.h: add support for built-in bswap functions

environment.c

@@ -81,6 +81,16 @@ int max_allowed_tree_depth =
 	 * the stack overflow can occur.
 	 */
 	512;
+#elif defined(GIT_WINDOWS_NATIVE) && defined(__clang__) && defined(__aarch64__)
+	/*
+	 * Similar to Visual C, it seems that on Windows/ARM64 the clang-based
+	 * builds have a smaller stack space available. When running out of
+	 * that stack space, a `STATUS_STACK_OVERFLOW` is produced. When the
+	 * Git command was run from an MSYS2 Bash, this unfortunately results
+	 * in an exit code 127. Let's prevent that by lowering the maximal
+	 * tree depth; This value seems to be low enough.
+	 */
+	1280;
 #else
 	2048;
 #endif