Update to current wasi-sysroot.

This updates wasi-sdk to use the latest version of "wasi-sysroot".

This fixes https://github.com/CraneStation/wasmtime/issues/88.

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/llvm/llvm-project
-[submodule "src/reference-sysroot"]
-	path = src/reference-sysroot
-	url = git@github.com:cranestation/reference-sysroot-wasi
+[submodule "src/wasi-sysroot"]
+	path = src/wasi-sysroot
+	url = git@github.com:CraneStation/wasi-sysroot

Makefile

@@ -39,11 +39,11 @@ build/llvm.BUILT:
 		llvm-config
 	touch build/llvm.BUILT
 
-build/reference-sysroot.BUILT: build/llvm.BUILT
-	make -C $(ROOT_DIR)/src/reference-sysroot \
+build/wasi-sysroot.BUILT: build/llvm.BUILT
+	make -C $(ROOT_DIR)/src/wasi-sysroot \
 		WASM_CC=$(PREFIX)/bin/clang \
 		SYSROOT=$(PREFIX)/share/sysroot
-	touch build/reference-sysroot.BUILT
+	touch build/wasi-sysroot.BUILT
 
 build/compiler-rt.BUILT: build/llvm.BUILT
 	mkdir -p build/compiler-rt
@@ -66,7 +66,7 @@ build/compiler-rt.BUILT: build/llvm.BUILT
 	cp -R $(ROOT_DIR)/build/llvm/lib/clang $(PREFIX)/lib/
 	touch build/compiler-rt.BUILT
 
-build/libcxx.BUILT: build/llvm.BUILT build/compiler-rt.BUILT build/reference-sysroot.BUILT
+build/libcxx.BUILT: build/llvm.BUILT build/compiler-rt.BUILT build/wasi-sysroot.BUILT
 	mkdir -p build/libcxx
 	cd build/libcxx; cmake -G "Unix Makefiles" \
 		-DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/wasi-sdk.cmake \
@@ -118,7 +118,7 @@ build/libcxxabi.BUILT: build/libcxx.BUILT build/llvm.BUILT
 	mv $(PREFIX)/share/sysroot/lib/libc++abi.a $(PREFIX)/share/sysroot/lib/wasm32-wasi/
 	touch build/libcxxabi.BUILT
 
-build: build/llvm.BUILT build/reference-sysroot.BUILT build/compiler-rt.BUILT build/libcxxabi.BUILT build/libcxx.BUILT
+build: build/llvm.BUILT build/wasi-sysroot.BUILT build/compiler-rt.BUILT build/libcxxabi.BUILT build/libcxx.BUILT
 
 strip: build/llvm.BUILT
 	cd $(PREFIX)/bin; strip clang-8 llc lld llvm-ar

README.md

@@ -8,10 +8,10 @@
 
 This repository contains no compiler or library code itself; it uses
 git submodules to pull in the upstream Clang and LLVM tree, as well as the
-WASI reference-sysroot tree.
+wasi-sysroot tree.
 
 The Sysroot portion of this SDK is the
-[WASI reference-sysroot](https://github.com/CraneStation/wasi-sysroot).
+[wasi-sysroot](https://github.com/CraneStation/wasi-sysroot).
 
 Upstream Clang and LLVM 8.0 can compile for WASI out of the box, and WebAssembly
 support is included in them by default. So, all that's done here is to provide

src/reference-sysroot

@@ -1 +0,0 @@
-Subproject commit d5a609fe63926533e1054e539ba5f2693d51bdf5

src/wasi-sysroot

@@ -0,0 +1 @@
+Subproject commit 320054e84f8f2440def3b1c8700cedb8fd697bf8