vendor: github.com/moby/buildkit v0.21.0-rc1

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>

vendor/github.com/moby/buildkit/util/system/path_unix.go

@@ -0,0 +1,17 @@
+//go:build !windows
+
+package system
+
+import "path/filepath"
+
+// IsAbsolutePath is just a wrapper that calls filepath.IsAbs.
+// Has been added here just for symmetry with Windows.
+func IsAbsolutePath(path string) bool {
+	return filepath.IsAbs(path)
+}
+
+// GetAbsolutePath does nothing on non-Windows, just returns
+// the same path.
+func GetAbsolutePath(path string) string {
+	return path
+}