[Build] Use host generator tools when cross-compiling

Author: bnbarham

utils/swift_build_support/swift_build_support/products/llvm.py

@@ -338,6 +338,10 @@ def build(self, host_target):
             llvm_cmake_options.define('LLVM_TABLEGEN', llvm_tblgen)
             clang_tblgen = os.path.join(host_build_dir, 'bin', 'clang-tblgen')
             llvm_cmake_options.define('CLANG_TABLEGEN', clang_tblgen)
+            confusable_chars_gen = os.path.join(host_build_dir, 'bin', 'clang-tidy-confusable-chars-gen')
+            llvm_cmake_options.define('CLANG_TIDY_CONFUSABLE_CHARS_GEN', confusable_chars_gen)
+            pseudo_gen = os.path.join(host_build_dir, 'bin', 'clang-pseudo-gen')
+            llvm_cmake_options.define('CLANG_PSEUDO_GEN', pseudo_gen)
             llvm = os.path.join(host_build_dir, 'llvm')
             llvm_cmake_options.define('LLVM_NATIVE_BUILD', llvm)