Fix building Wasm stdlib with macOS presets (swiftlang#80850)

Added optional `ignore_extra_cmake_options` to `cmake_product.py`, existing behavior is preserved with the default argument value set to `False`.

Passed `ignore_extra_cmake_options=True` in `wasisysroot.py`. This allows libc++ for WASI to be built correctly with `-fno-exceptions` in presence of `extra-cmake-options` in macOS presets (which are absent in Linux presets).

Author: MaxDesiatov

utils/swift_build_support/swift_build_support/products/cmake_product.py

@@ -24,7 +24,8 @@ def is_verbose(self):
         return self.args.verbose_build
 
     def build_with_cmake(self, build_targets, build_type, build_args,
-                         prefer_native_toolchain=False):
+                         prefer_native_toolchain=False, 
+                         ignore_extra_cmake_options=False):
         assert self.toolchain.cmake is not None
         cmake_build = []
         _cmake = cmake.CMake(self.args, self.toolchain,
@@ -67,7 +68,8 @@ def build_with_cmake(self, build_targets, build_type, build_args,
                 shell.call(["env"] + [self.toolchain.cmake]
                            + list(_cmake.common_options(self))
                            + list(self.cmake_options)
-                           + self.args.extra_cmake_options + [self.source_dir],
+                           + (self.args.extra_cmake_options if not ignore_extra_cmake_options else [])
+                           + [self.source_dir],
                            env=env)
 
         is_llvm = self.product_name() == "llvm"

utils/swift_build_support/swift_build_support/products/wasisysroot.py

@@ -230,7 +230,8 @@ def _build(self, host_target, enable_wasi_threads, compiler_rt_os_dir, target_tr
         cmake.cmake_options.define('UNIX:BOOL', 'TRUE')
 
         cmake.build_with_cmake([], cmake.args.build_variant, [],
-                               prefer_native_toolchain=True)
+                               prefer_native_toolchain=True,
+                               ignore_extra_cmake_options=True)
         cmake.install_with_cmake(
             ["install"], WASILibc.sysroot_install_path(build_root, target_triple))