Add some missing SPDX-License-Identifiers

examples/try_lock_a_bunch.cpp

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 /*
  * A simple example with 30 timed mutexes where one is locked
  * for 40 milliseconds before being released.

examples/try_lock_until_success.cpp

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 /*
  * A simple example with 30 timed mutexes where one is locked
  * for 40 milliseconds before being released.

include/beman/timed_lock_alg/mutex.hpp

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 #ifndef BEMAN_TIMED_LOCK_ALG_MUTEX_HPP
 #define BEMAN_TIMED_LOCK_ALG_MUTEX_HPP
 

papers/generate_html.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 if (( $# != 1 )); then
     echo "USAGE: $0 proposal" >&2
     exit 1