Add handling for libc_hwasan to Soong

libc_hwasan is a new library in the runtime apex that lives in
bionic/hwasan/libc.so and is symlinked to /system/lib64/hwasan/libc.so.
This is chosen by the linker if an app or binary requires HWASan
support.

Bug: 276930343
Change-Id: If331744ad84241ad99a41805ea3110d37cf9b0af

cc/sanitize.go

@@ -785,6 +785,13 @@ func (s *sanitize) flags(ctx ModuleContext, flags Flags) Flags {
 		if Bool(sanProps.Writeonly) {
 			flags.Local.CFlags = append(flags.Local.CFlags, "-mllvm", "-hwasan-instrument-reads=0")
 		}
+		if !ctx.staticBinary() && !ctx.Host() {
+			if ctx.bootstrap() {
+				flags.DynamicLinker = "/system/bin/bootstrap/linker_hwasan64"
+			} else {
+				flags.DynamicLinker = "/system/bin/linker_hwasan64"
+			}
+		}
 	}
 
 	if Bool(sanProps.Fuzzer) {