Build static library for JavaScriptCore before linking framework. We want to build libJavaScriptCore.a before linking JavaScriptCore.framework so that we have the option of linking `jsc` with libJavaScriptCore.a instead of JavaScriptCore.framework for certain configurations. <rdar://113641596>
Pull request: https://github.com/WebKit/WebKit/pull/19575
Committed 270226@main (3d7329069950): <https://commits.webkit.org/270226@main> Reviewed commits have been landed. Closing PR #19575 and removing active labels.