Framework: fix for wizard file permissions

[mreid-tt]

Description

In some builds that included wizard UI files based on shell scripts, the shell scripts didn't execute during the installation wizard under DSM6 because they lacked the execute bit set (#5524 (comment) and #5455 (comment)). This issue occurred because the current spksrc.spk.mk set the execute bit as part of a block that evaluated the contents of the parent folder based on wildcards. However, for Makefiles, wildcards are evaluated during parsing and are not re-evaluated when the containing statement is executed (see: The Trouble with $(wildcard)).

To solve this issue, we define a new variable called WIZARD_FILE_LIST that generates a list of files in the directory. Then we reference this variable from the wizards target in an if statement to check if the variable has a value. This approach ensures that the variable has the correct value when evaluated, and we no longer rely on wildcards to evaluate the contents of the parent folder.

To solve this issue, the code was modified to check the existence of the DSM_WIZARDS_DIR directory instead. If the WIZARDS_DIR variable was already evaluated as not null, this directory would exist, ensuring that the files within it are consistently processed for file permissions. This approach removes the reliance on wildcards to evaluate the contents of the parent folder and ensures that the shell scripts have the correct file permissions during the installation wizard.

Follow up of #5383
Fixes #

Checklist

• Build rule all-supported completed successfully
• New installation of package completed successfully
• Package upgrade completed successfully (Manually install the package again)
• Package functionality was tested
• Any needed documentation is updated/created

Type of change

• Bug fix
• New Package
• Package update
• Includes small framework changes
• This change requires a documentation update (e.g. Wiki)

[th0ma7]

LGTM