gitlab-ci: Fix source tarball job

* Use show! in source tarball job. Since we aren't actually building
  anything in this job `show` won't
  work.

* Fix Docker image name

* Make `version` file contain only version string
18 jobs for !1450 with wip/bump-cabal in 336 minutes and 43 seconds (queued for 3 seconds)
detached
Status Job ID Name Coverage
  Lint
passed #128603
lint
ghc-linters

00:00:16

passed #128604
lint
lint-submods-mr

00:00:15

 
  Build
failed #128607
x86_64-linux allowed to fail
release-x86_64-linux-deb9-dwarf

00:59:29

passed #128605
x86_64-linux
validate-x86_64-linux-deb8-hadrian

01:59:00

passed #128606
x86_64-linux
validate-x86_64-linux-deb9-debug

01:35:20

 
  Full Build
failed #128609
aarch64-linux allowed to fail
validate-aarch64-linux-deb9

01:00:14

passed #128610
x86_64-linux
validate-i386-linux-deb9

01:42:29

passed #128608
x86_64-darwin
validate-x86_64-darwin

01:00:14

passed #128611
x86_64-linux
validate-x86_64-linux-deb9

00:58:05

failed #128613
x86_64-linux allowed to fail
validate-x86_64-linux-deb9-integer-simple

00:27:07

passed #128612
x86_64-linux
validate-x86_64-linux-deb9-llvm

01:53:41

passed #128614
x86_64-linux
validate-x86_64-linux-deb9-unreg

03:08:52

passed #128615
x86_64-linux
validate-x86_64-linux-fedora27

01:45:42

failed #128617
x86_64-windows allowed to fail
validate-x86_64-windows

02:56:40

failed #128616
x86_64-windows allowed to fail
validate-x86_64-windows-hadrian

00:15:44

 
  Cleanup
passed #128619
x86_64-darwin
cleanup-darwin

00:00:07

passed #128618
x86_64-windows
cleanup-windows

00:00:51

 
  Hackage
manual #128620
x86_64-linux allowed to fail manual
hackage
 
Name Stage Failure
failed
validate-aarch64-linux-deb9 Full Build
$ cp -Rf $HOME/.cabal cabal-cache
Uploading artifacts...
WARNING: ghc-*.tar.xz: no matching files
WARNING: junit.xml: no matching files
ERROR: No files to upload
Uploading artifacts...
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1
failed
validate-x86_64-windows-hadrian Full Build
   Speed :            16271443 Bytes/sec.
Speed : 931.059 MegaBytes/min.
Ended : Monday, July 22, 2019 12:41:48 AM

Uploading artifacts...
Runtime platform arch=amd64 os=windows pid=7164 revision=1f513601 version=11.10.1
WARNING: ghc.tar.xz: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1
failed
release-x86_64-linux-deb9-dwarf Build
$ cp -Rf $HOME/.cabal cabal-cache
Uploading artifacts...
ghc-*.tar.xz: found 1 matching files
junit.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=128607 responseStatus=201 Created token=zF--k6Xs
Uploading artifacts...
junit.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=128607 responseStatus=201 Created token=zF--k6Xs
ERROR: Job failed: exit code 1
failed
validate-x86_64-linux-deb9-integer-simple Full Build
make[1]: *** Waiting for unfinished jobs....
make: *** [all] Error 2
Makefile:123: recipe for target 'all' failed
Running after script...
$ cp -Rf $HOME/.cabal cabal-cache
Uploading artifacts...
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1
failed
validate-x86_64-windows Full Build
junit.xml: found 1 matching files                  
WARNING: Failed to load system CertPool:crypto/x509: system root pool is not available on Windows
Uploading artifacts to coordinator... ok
id=128617 responseStatus=201 Created token=kQ3oPzzT
Uploading artifacts...
Runtime platform
arch=amd64 os=windows pid=7128 revision=1f513601 version=11.10.1
junit.xml: found 1 matching files

WARNING: Failed to load system CertPool:crypto/x509: system root pool is not available on Windows
Uploading artifacts to coordinator... ok
id=128617 responseStatus=201 Created token=kQ3oPzzT
ERROR: Job failed: exit status 2