Rename thread_spawn import (#1907)

Following the wit-defined ABI:
https://github.com/WebAssembly/wasi-threads/pull/26

cf. https://github.com/WebAssembly/wasi-libc/pull/387

.github/workflows/compilation_on_android_ubuntu.yml

@@ -326,8 +326,13 @@ jobs:
 
       - name: build wasi-libc (needed for wasi-threads)
         run: |
-          git clone --branch wasi-sdk-17 https://github.com/WebAssembly/wasi-libc
+          mkdir wasi-libc
           cd wasi-libc
+          git init
+          # "Rename thread_spawn import" commit on main branch
+          git fetch https://github.com/WebAssembly/wasi-libc \
+            8f5275796a82f8ecfd0833a4f3f444fa37ed4546
+          git checkout FETCH_HEAD
           make \
             AR=/opt/wasi-sdk/bin/llvm-ar \
             NM=/opt/wasi-sdk/bin/llvm-nm \

.github/workflows/compilation_on_macos.yml

@@ -268,8 +268,13 @@ jobs:
 
       - name: build wasi-libc (needed for wasi-threads)
         run: |
-          git clone --branch wasi-sdk-17 https://github.com/WebAssembly/wasi-libc
+          mkdir wasi-libc
           cd wasi-libc
+          git init
+          # "Rename thread_spawn import" commit on main branch
+          git fetch https://github.com/WebAssembly/wasi-libc \
+            8f5275796a82f8ecfd0833a4f3f444fa37ed4546
+          git checkout FETCH_HEAD
           make \
             AR=/opt/wasi-sdk/bin/llvm-ar \
             NM=/opt/wasi-sdk/bin/llvm-nm \
@@ -329,4 +334,4 @@ jobs:
           mkdir build && cd build
           cmake -DWASI_SYSROOT=`pwd`/../../../core/deps/wasi-libc/sysroot ..
           cmake --build . --config Release --parallel 4
-          ./iwasm wasm-apps/no_pthread.wasm
+          ./iwasm wasm-apps/no_pthread.wasm

.github/workflows/compilation_on_sgx.yml

@@ -270,8 +270,13 @@ jobs:
 
       - name: build wasi-libc (needed for wasi-threads)
         run: |
-          git clone --branch wasi-sdk-17 https://github.com/WebAssembly/wasi-libc
+          mkdir wasi-libc
           cd wasi-libc
+          git init
+          # "Rename thread_spawn import" commit on main branch
+          git fetch https://github.com/WebAssembly/wasi-libc \
+            8f5275796a82f8ecfd0833a4f3f444fa37ed4546
+          git checkout FETCH_HEAD
           make \
             AR=/opt/wasi-sdk/bin/llvm-ar \
             NM=/opt/wasi-sdk/bin/llvm-nm \