Fix typos

[Sajjon]

Fixes ~40 typos of which two where incorrect spellings of #if FOUNDATION_FRAMWORK.

I don't have Swift 5.9 toolchain setup, so I have not been able to run tests.

[mortenbekditlevsen]

Hi @Sajjon , I found another typo and created an issue here: https://github.com/apple/swift-foundation/issues/69

There's a canImport(Gibc) rather than Glibc.

I thought that since you already have this PR open, you could perhaps add a fix for that one too? :-)

[nathreed]

There's a canImport(Gibc) rather than Glibc.

I thought that since you already have this PR open, you could perhaps add a fix for that one too? :-)

I just noticed this typo before you commented and made a PR #70 to fix it in isolation. It's ok if we want to lump the fix in with this one too.

[Sajjon]

@nathreed @mortenbekditlevsen thx, I included that typo in this PR as well now.

[iCharlesHu]

@swift-ci please test

[parkera]

@swift-ci test

[parkera]

@shahmishal fixed the issue with the Linux CI; if we rebase this it'll pick up that fix

[shahmishal]

@swift-ci test