Install host toolchain without date in name

Installation host toolchain to directory with date breaks incremental
builds after date changed because CMakeCache points old host-toolchain
dir but the build-script installs toolchain in new date directory.

Author: kateinoigakukun

utils/webassembly/build-presets.ini

@@ -18,7 +18,7 @@ install-swift
 install-destdir=%(INSTALL_DESTDIR)s
 swift-install-components=autolink-driver;compiler;clang-resource-dir-symlink;stdlib;sdk-overlay;parser-lib;editor-integration;tools;testsuite-tools;toolchain-tools;license;sourcekit-inproc;swift-remote-mirror;swift-remote-mirror-headers
 llvm-install-components=llvm-cov;llvm-profdata;IndexStore;clang;clang-resource-headers;compiler-rt;clangd;dsymutil;lld;llvm-ar;llvm-ranlib
-install-prefix=/%(TOOLCHAIN_NAME)s/usr
+install-prefix=/usr
 
 
 [preset: webassembly-host]

utils/webassembly/build-toolchain.sh

@@ -73,8 +73,7 @@ build_host_toolchain() {
     --preset=$HOST_PRESET \
     --build-dir="$HOST_BUILD_DIR" \
     HOST_ARCHITECTURE="$(uname -m)" \
-    INSTALL_DESTDIR="$HOST_TOOLCHAIN_DESTDIR" \
-    TOOLCHAIN_NAME="$TOOLCHAIN_NAME"
+    INSTALL_DESTDIR="$HOST_TOOLCHAIN_DESTDIR"
 }
 
 build_target_toolchain() {
@@ -190,7 +189,8 @@ create_darwin_info_plist() {
 if [ ${BUILD_HOST_TOOLCHAIN} -eq 1 ]; then
   build_host_toolchain
   rm -rf "$DIST_TOOLCHAIN_DESTDIR"
-  rsync -a "$HOST_TOOLCHAIN_DESTDIR/" "$DIST_TOOLCHAIN_DESTDIR"
+  mkdir -p "$DIST_TOOLCHAIN_SDK"
+  rsync -a "$HOST_TOOLCHAIN_DESTDIR/" "$DIST_TOOLCHAIN_SDK"
 fi
 
 build_target_toolchain