testing/tinyscheme: use SPDX license identifier

and fix linter warnings
7 jobs for !10961 with tinyscheme in 46 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Lint
passed #178243
docker-alpine x86_64
lint

00:00:23

 
  Build
failed #178248
docker-alpine ci-build aarch64
build-aarch64

00:00:06

failed #178249
docker-alpine ci-build armv7
build-armv7

00:00:10

failed #178247
docker-alpine ci-build ppc64le
build-ppc64le

00:00:09

failed #178246
docker-alpine ci-build s390x
build-s390x

00:00:05

failed #178245
docker-alpine ci-build x86
build-x86

00:00:10

failed #178244
docker-alpine ci-build x86_64
build-x86_64

00:00:09

 
Name Stage Failure
failed
build-x86_64 Build
No job log
failed
build-ppc64le Build
No job log
failed
build-x86 Build
No job log
failed
build-armv7 Build
No job log
failed
build-aarch64 Build
No job log
failed
build-s390x Build
No job log