Add libc++ installation for 32-bit arch

Bump llvm to 16.0.5

Author: jysh1214

.github/workflows/nightly-release.yaml

@@ -71,7 +71,7 @@ jobs:
           BUILD_TOOLCHAIN="./configure --prefix=/opt/riscv --with-arch=${TARGET_TUPLE[0]} --with-abi=${TARGET_TUPLE[1]}"
           if [ "${{ matrix.mode }}" == "linux" ]; then # build toolchain with llvm
             $BUILD_TOOLCHAIN --enable-llvm --enable-linux
-            sudo make -j $(nproc) all build-sim SIM=qemu
+            sudo make -j $(nproc) all
           else
             $BUILD_TOOLCHAIN
             sudo make -j $(nproc) ${{ matrix.mode }}

Makefile.in

@@ -937,7 +937,7 @@ stamps/build-llvm-linux: $(LLVM_SRCDIR) $(LLVM_SRC_GIT) \
 	    -DLLVM_PARALLEL_LINK_JOBS=4
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
-	cp $(notdir $@)/lib/riscv64-unknown-linux-gnu/libc++* $(SYSROOT)/lib
+	cp $(notdir $@)/lib/riscv$(XLEN)-unknown-linux-gnu/libc++* $(SYSROOT)/lib
 	cd $(INSTALL_DIR)/bin && ln -s clang $(LINUX_TUPLE)-clang
 	mkdir -p $(dir $@) && touch $@