Set the arch to armv7 by default when building for iOS

Otherwise it would build for the simulator by default, which
in most cases probably isn't what was intended.
Remove unnecessary stray __cdecl annotations in function signature comments in x86 assembly
Remove a stray inline keyword in a function signature comment in x86 assembly

Assembly functions written in external assembly files is obviously
not inlined.
fix WELS_READ_VERIFY
Merge pull request #464 from licaiguo/fix-type-wels-read-verify

fix WELS_READ_VERIFY
Merge pull request #461 from mstorsjo/fix-asm-comments

Remove unnecessary/stray keywords in function signature comments in x86 assembly
Merge pull request #459 from mstorsjo/ios-default-arch

Set the arch to armv7 by default when building for iOS
Merge remote-tracking branch 'upstream/master' into travis.osx