[5.7.0][Driver] Work around lld 13+ issue with --gc-sections for ELF by adding -z nostart-stop-gc (#60544)

[finagolfin]

Cherrypick of #60653, the equivalent was already merged into 5.7 with swiftlang/swift-driver#1158 so best to get this into the C++ Driver in 5.7.0 too to avoid any inconsistency

Explanation: lld 13 changed how --gc-sections works last year, which was then flipped on by default, and causes all Swift code on ELF platforms not to link with lld 13 and 14 anymore if stripping is enabled.

Scope: Only affects lld for these ELF platforms

SR Issue: #60406

Risk: low, since it only affects ELF platforms for this one linker and flag

Testing: I built the last August 2 source snapshot of the 5.7 toolchain for Android AArch64, where lld 14 is the default linker, with this patch and it works well.

Reviewer: @compnerd

[finagolfin]

@DougGregor, let me know if we can get this in.

@al45tair, would you run the CI on this?

[keith]

@swift-ci please test

[nkcsgexi]

This should affect non-Darwin platforms and the legacy driver only.

[finagolfin]

Ping @DougGregor or @shahmishal, is it still possible to get this into the release/5.7.0 branch? Since this was already merged into the release/5.7 branch for swift-driver, swiftlang/swift-driver#1158, I believe this flag will be applied by the new swift-driver in the upcoming 5.7.0 release, so this pull is just to make sure the legacy C++ driver in the 5.7.0 compiler matches.

[finagolfin]

Now that 5.7 is out, too late to get this in so closing.