Fix path collision on case-insensitive FS

[dbaynard]

The modules/Src and modules/src paths collide on MacOS (for example) and Src is preferred, meaning builds fail.

This replaces the modules/Src/Aloxaf.gitignore with entries in the modules/.gitignore that does a similar thing (it actually ignores the whole Src directory).

Fixes #420

[Aloxaf]

This is a historical issue. The Src directory was used to store built module. Removing it could cause build process failures or users have to to rebuild the module.

I suggest merging the src directory into Src.

Relevant code:

fzf-tab/lib/-ftb-build-module

Lines 18 to 19 in f3d892c

	ln -s $PWD/src/fzftab.c ./zsh/$zsh_version/Src/Modules/
	ln -s $PWD/src/fzftab.mdd ./zsh/$zsh_version/Src/Modules/