Add perl modeline to Configure scripts

Encourages GitHub to perform proper syntax highlighting.
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Configurations/10-main.conf

+## -*- mode: perl; -*-
 ## Standard openssl configuration targets.
 ##
 ## If you edit this file, run this command before committing

Configurations/90-team.conf

+## -*- mode: perl; -*-
 ## Build configuration targets for openssl-team members
 ##
 ## If you edit this file, run this command before committing

Configurations/99-personal-ben.conf

+## -*- mode: perl; -*-
 ## Personal configuration targets
 ##
 ## If you edit this file, run this command before committing

Configurations/99-personal-bodo.conf

+## -*- mode: perl; -*-
 ## Personal configuration targets
 ##
 ## If you edit this file, run this command before committing

Configurations/99-personal-geoff.conf

+## -*- mode: perl; -*-
 ## Personal configuration targets
 ##
 ## If you edit this file, run this command before committing

Configurations/99-personal-levitte.conf

+## -*- mode: perl; -*-
 ## Personal configuration targets
 ##
 ## If you edit this file, run this command before committing

Configurations/99-personal-rse.conf

+## -*- mode: perl; -*-
 ## Personal configuration targets
 ##
 ## If you edit this file, run this command before committing

Configurations/99-personal-steve.conf

+## -*- mode: perl; -*-
 ## Personal configuration targets
 ##
 ## If you edit this file, run this command before committing

Configure

+# -*- mode: perl; -*-
 :
 eval 'exec perl -S $0 ${1+"$@"}'
     if $running_under_some_shell;