Add an early arm toolchain

This isn't fully functionnal yet

patches/clang-0001.patch

@@ -0,0 +1,37 @@
+From de8c959c54b4591b13d7ab0c348bac8d25cc856a Mon Sep 17 00:00:00 2001
+From: Martell Malone <martellmalone@gmail.com>
+Date: Wed, 16 Dec 2015 02:07:06 -0800
+Subject: [PATCH] use lld and compiler-rt by default
+
+
+diff --git a/lib/Driver/ToolChains.h b/lib/Driver/ToolChains.h
+index 257750e..831b7ab 100644
+--- a/lib/Driver/ToolChains.h
++++ b/lib/Driver/ToolChains.h
+@@ -649,6 +649,10 @@ public:
+       const llvm::opt::ArgList &DriverArgs,
+       llvm::opt::ArgStringList &CC1Args) const override;
+ 
++  RuntimeLibType GetDefaultRuntimeLibType() const override {
++    return RuntimeLibType::RLT_CompilerRT;
++  }
++
+ protected:
+   Tool *getTool(Action::ActionClass AC) const override;
+   Tool *buildLinker() const override;
+diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
+index 20a1035..ec3e42d 100644
+--- a/lib/Driver/Tools.cpp
++++ b/lib/Driver/Tools.cpp
+@@ -9600,7 +9600,7 @@ void MinGW::Linker::ConstructJob(Compilation &C, const JobAction &JA,
+   // handled somewhere else.
+   Args.ClaimAllArgs(options::OPT_w);
+ 
+-  StringRef LinkerName = Args.getLastArgValue(options::OPT_fuse_ld_EQ, "ld");
++  StringRef LinkerName = Args.getLastArgValue(options::OPT_fuse_ld_EQ, "lld");
+   if (LinkerName.equals_lower("lld")) {
+     CmdArgs.push_back("-flavor");
+     CmdArgs.push_back("gnu");
+-- 
+2.6.3
+