sh: lib: convert to SPDX identifiers Update license to use SPDX-License-Identifier instead of verbose license text. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Kuninori Morimoto <[email protected]> Reviewed-by: Simon Horman <[email protected]> Cc: Yoshinori Sato <[email protected]> Cc: Rich Felker <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>