testing/flann: add -doc subpackage and install license

Status Job ID Name Coverage
  Lint
failed #232338
x86_64 docker-alpine allowed to fail
lint

00:00:22

 
  Build
passed #232343
aarch64 ci-build docker-alpine
build-aarch64

00:05:24

passed #232344
armv7 ci-build docker-alpine
build-armv7

00:04:26

passed #232342
ppc64le ci-build docker-alpine
build-ppc64le

00:04:50

passed #232341
s390x ci-build docker-alpine
build-s390x

00:04:10

passed #232340
x86 ci-build docker-alpine
build-x86

00:03:08

passed #232339
x86_64 ci-build docker-alpine
build-x86_64

00:02:18

 
Name Stage Failure
failed
lint Lint
No job log