.gitlab-ci.yml: removed references to i686 package installation

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
6 jobs from tmp-protect-ber-decoder-from-recursion in 5 minutes 52 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #46674733
shared
Build and Check (x86)

01:40

passed #46674731
shared
Build and Check (x86-64)

04:20

passed #46674736
shared
Build and Check with asan

03:38

passed #46674735
shared
Build and Check with clang

02:38

passed #46674737
shared
Build and Check with ubsan

03:44

passed #46674738
shared docker
MinGW32

05:50

 
Name Stage Failure
failed
Build and Check (x86) Test There is an unknown failure, please try again
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
checking for gcc... gcc
checking whether the C compiler works... no
configure: error: in `/builds/gnutls/libtasn1':
configure: error: C compiler cannot create executables
See `config.log' for more details
ERROR: Job failed: exit code 77