Fix Rogue Company patch and change injection method

[xiota]

Changes:

• Fix syntax error in Rogue Company patch. Fixes #17
  • I can split this to another PR if other changes in this PR aren't wanted.
• Change method of injecting fixes (more resistant to upstream changes).
  • Append to PKGBUILD instead of patching.
  • Set LDFLAGS directly instead of patching. Fixes #16
• Add shebang to script, remove leading spaces
• Add status messages, so more clear what changes are applied.
• Make possible to use different options without editing.
  • Example: _rogue_company_fix=t ./glibc_eac.sh
• Change script commands:
  • unattended - build only without user input
  • build - build only, after user input
  • default - build and install, after user input

[Tk-Glitch]

Looks fine to me. Thank you very much xiota! :frog: :heart: