Switch on default now/relro without depending on ID=alpine in /etc/os-release

--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -223,16 +223,11 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
 
   Distro Distro(D.getVFS(), Triple);
 
-  if (Distro.IsAlpineLinux() || Triple.isAndroid()) {
     ExtraOpts.push_back("-z");
     ExtraOpts.push_back("now");
-  }
 
-  if (Distro.IsOpenSUSE() || Distro.IsUbuntu() || Distro.IsAlpineLinux() ||
-      Triple.isAndroid()) {
     ExtraOpts.push_back("-z");
     ExtraOpts.push_back("relro");
-  }
 
   // Note, lld from 11 onwards default max-page-size to 65536 for both ARM and
   // AArch64.