message: Set bash as required for building Tink C++ examples
diff: @@ -11,7 +11,7 @@ set(CMAKE_BUILD_TYPE Release)
  add_subdirectory(../.. tink)
  # Make sure we have bash.
  -find_program(BASH_PROGRAM bash)
  +find_program(BASH_PROGRAM bash REQUIRED)
  # Include path at the base of the examples folder.
  set(TINK_EXAMPLES_INCLUDE_PATH "${CMAKE_SOURCE_DIR}")
  