Add copyright headers to all shell scripts

Add AMD copyright and MIT license identifier to:
- common.sh
- ck-build-analysis
- ck-docker

Matches the copyright header format used throughout the codebase.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: tenpercent

.claude/skills/ck-build-analysis

@@ -1,4 +1,7 @@
 #!/bin/bash
+# Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
+# SPDX-License-Identifier: MIT
+
 # CK Build Analysis Skill - Analyze build times using -ftime-trace
 
 set -e

.claude/skills/ck-docker

@@ -1,4 +1,7 @@
 #!/bin/bash
+# Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
+# SPDX-License-Identifier: MIT
+
 # CK Docker Skill - Build and test composable_kernel in Docker with ROCm support
 
 set -e

.claude/skills/common.sh

@@ -1,4 +1,7 @@
 #!/bin/bash
+# Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
+# SPDX-License-Identifier: MIT
+
 # Common utilities for CK Docker skills
 # Shared configuration and helper functions