[Basic] Support 32-bit x86 and ARM targets for Fuchsia

[phosek]

Summary

Fuchsia has experimental support for 32-bit x86 and ARM targets, add them to the list of supported targets.

[bkramer]

lg

[rsmith]

lib/Basic/Targets.cpp

case llvm::Triple::aarch64:
     if (Triple.isOSDarwin())
       return new DarwinAArch64TargetInfo(Triple, Opts);
 
     switch (os) {
     case llvm::Triple::CloudABI:
       return new CloudABITargetInfo<AArch64leTargetInfo>(Triple, Opts);
     case llvm::Triple::FreeBSD:
       return new FreeBSDTargetInfo<AArch64leTargetInfo>(Triple, Opts);
+    case llvm::Triple::Fuchsia:
+      return new FuchsiaTargetInfo<AArch64leTargetInfo>(Triple, Opts);
     case llvm::Triple::Linux:
       return new LinuxTargetInfo<AArch64leTargetInfo>(Triple, Opts);
     case llvm::Triple::NetBSD:
       return new NetBSDTargetInfo<AArch64leTargetInfo>(Triple, Opts);
-    case llvm::Triple::Fuchsia:
-      return new FuchsiaTargetInfo<AArch64leTargetInfo>(Triple, Opts);
     default:
       return new AArch64leTargetInfo(Triple, Opts);
     }
 
   case llvm::Triple::aarch64_be:
     switch (os) {
     case llvm::Triple::FreeBSD:
       return new FreeBSDTargetInfo<AArch64beTargetInfo>(Triple, Opts);
+    case llvm::Triple::Fuchsia:
+      return new FuchsiaTargetInfo<AArch64beTargetInfo>(Triple, Opts);
     case llvm::Triple::Linux:
       return new LinuxTargetInfo<AArch64beTargetInfo>(Triple, Opts);
     case llvm::Triple::NetBSD:
       return new NetBSDTargetInfo<AArch64beTargetInfo>(Triple, Opts);
     default:
       return new AArch64beTargetInfo(Triple, Opts);
     }
 
   case llvm::Triple::arm:
   case llvm::Triple::thumb:
     if (Triple.isOSBinFormatMachO())
       return new DarwinARMTargetInfo(Triple, Opts);
 
     switch (os) {
     case llvm::Triple::CloudABI:
       return new CloudABITargetInfo<ARMleTargetInfo>(Triple, Opts);
     case llvm::Triple::Linux:
       return new LinuxTargetInfo<ARMleTargetInfo>(Triple, Opts);
     case llvm::Triple::FreeBSD:
       return new FreeBSDTargetInfo<ARMleTargetInfo>(Triple, Opts);
+    case llvm::Triple::Fuchsia:
+      return new FuchsiaTargetInfo<ARMleTargetInfo>(Triple, Opts);
     case llvm::Triple::NetBSD:
       return new NetBSDTargetInfo<ARMleTargetInfo>(Triple, Opts);
     case llvm::Triple::OpenBSD:
       return new OpenBSDTargetInfo<ARMleTargetInfo>(Triple, Opts);
     case llvm::Triple::Bitrig:
       return new BitrigTargetInfo<ARMleTargetInfo>(Triple, Opts);
     case llvm::Triple::RTEMS:
       return new RTEMSTargetInfo<ARMleTargetInfo>(Triple, Opts);
case llvm::Triple::thumbeb:
     if (Triple.isOSDarwin())
       return new DarwinARMTargetInfo(Triple, Opts);
 
     switch (os) {
     case llvm::Triple::Linux:
       return new LinuxTargetInfo<ARMbeTargetInfo>(Triple, Opts);
     case llvm::Triple::FreeBSD:
       return new FreeBSDTargetInfo<ARMbeTargetInfo>(Triple, Opts);
+    case llvm::Triple::Fuchsia:
+      return new FuchsiaTargetInfo<ARMbeTargetInfo>(Triple, Opts);
     case llvm::Triple::NetBSD:
       return new NetBSDTargetInfo<ARMbeTargetInfo>(Triple, Opts);
     case llvm::Triple::OpenBSD:
       return new OpenBSDTargetInfo<ARMbeTargetInfo>(Triple, Opts);
     case llvm::Triple::Bitrig:
       return new BitrigTargetInfo<ARMbeTargetInfo>(Triple, Opts);
     case llvm::Triple::RTEMS:
       return new RTEMSTargetInfo<ARMbeTargetInfo>(Triple, Opts);