[WASM] Install IndexStore

Author: kateinoigakukun

utils/build-presets.ini

@@ -2581,7 +2581,7 @@ skip-build-benchmarks
 llvm-targets-to-build=X86;AArch64;WebAssembly
 install-destdir=%(INSTALL_DESTDIR)s
 swift-install-components=autolink-driver;compiler;clang-builtin-headers;stdlib;sdk-overlay;parser-lib;editor-integration;tools;testsuite-tools;toolchain-tools;license;sourcekit-inproc;swift-remote-mirror;swift-remote-mirror-headers;clang-resource-dir-symlink
-llvm-install-components=clang;compiler-rt;lld;llvm-ar;llvm-ranlib
+llvm-install-components=clang;compiler-rt;lld;llvm-ar;llvm-ranlib;IndexStore
 install-swift
 install-prefix=/%(TOOLCHAIN_NAME)s/usr
 swift-darwin-supported-archs=x86_64