PSP-Fixup-Imports utility: Add support for processing variable imports

[Felix-Dev]

Our psp-fixup-imports program currently does not have working support for processing variable imports. Attempting to fix a variable import for a module results in a sgmentation fault:

Some initial work has been done to support variable import processing which should be investigated for issues:

uofw/utils/fixup-imports/psp-fixup-imports.c

Line 722 in e0685d5

int fixup_variables(void)

Adding this support is required by our power service to fully function as intended. While the missing support does not appear to cause a crash on the PSP system when running our power service, some functionality might be negatively impacted by the lack of support.