Revert "Revert "Build system changes for CFI (Soong)""

This reverts commit 33c252c2f1.

I have a fix to the crashes that this CL set was causing, and have
uploaded it as a patchset to this revert.

This also contains a partial fix that was initially submitted
separately as
https://android-review.googlesource.com/#/c/platform/build/soong/+/524295/

Bug: 30227045
Test: ./art/test/testrunner/run_build_test_target.py -j110 art-asan #no
build errors
Test: m -j50 ASAN_OPTIONS=detect_leaks=0 SANITIZE_HOST=address # no
build errors

Change-Id: I3e53549fa03413d35d9a952f04de1e7629e1f06d

cc/library.go

@@ -513,6 +513,10 @@ func (library *libraryDecorator) linkShared(ctx ModuleContext,
 		if versionScript.Valid() {
 			flags.LdFlags = append(flags.LdFlags, "-Wl,--version-script,"+versionScript.String())
 			linkerDeps = append(linkerDeps, versionScript.Path())
+			if library.sanitize.isSanitizerEnabled(cfi) {
+				flags.LdFlags = append(flags.LdFlags, "-Wl,--version-script,"+cfiExportsMap.String())
+				linkerDeps = append(linkerDeps, cfiExportsMap)
+			}
 		}
 		if unexportedSymbols.Valid() {
 			ctx.PropertyErrorf("unexported_symbols_list", "Only supported on Darwin")