Autodetect path to 'Platforms'
Update build-gambit-iOS to 4.6.7, make changev keep it in sync
Don't download if we already have it.
Simplify, rename  ->
Remove $ios_kind (there's only one kind)
Remove more noise lines
Always use latest iOS SDK
Add --no-update flag to build-gambit-iOS
Merge pull request #13 from maitria/gambit_ios_script_update

Gambit ios script update
Fix end-of-line encoding problems with "make check" on Windows.
Better fix for end-of-line encoding problem on "make check" on Windows.
Fix execute permission on gsc-boot
Add variadic fx<, fx=, etc to _t-univ.scm
Add variadic versions of fxwrap+, fxwrap-, etc to _t-univ.scm