tools: fix riscv64 build failed

[luyahan]

fix #52678

[nodejs-github-bot]

Review requested:

• @nodejs/gyp
• @nodejs/v8-update

[sxa]

I had a try with your branch with GCC10 from Ubuntu 20.04/riscv64 and run into an issue with a number of symbols when building the test code - is that expected and do you get the same failure? I don't think I've seen these before.

../deps/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::RmDir(const char*)':
../deps/googletest/include/gtest/internal/gtest-port.h:2053:44: error: 'rmdir' was not declared in this scope; did you mean 'simdutf::internal::rmdir'?
../deps/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::DoIsATTY(int)':
../deps/googletest/include/gtest/internal/gtest-port.h:2084:38: error: 'isatty' was not declared in this scope; did you mean 'simdutf::internal::isatty'?
../deps/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::ChDir(const char*)':
../deps/googletest/include/gtest/internal/gtest-port.h:2113:44: error: 'chdir' was not declared in this scope; did you mean 'simdutf::internal::chdir'?
../deps/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::Read(int, void*, unsigned int)':
../deps/googletest/include/gtest/internal/gtest-port.h:2135:27: error: 'read' was not declared in this scope; did you mean 'simdutf::internal::read'?
../deps/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::Write(int, const void*, unsigned int)':
../deps/googletest/include/gtest/internal/gtest-port.h:2138:27: error: 'write' was not declared in this scope; did you mean 'simdutf::internal::write'?
../deps/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::Close(int)':
../deps/googletest/include/gtest/internal/gtest-port.h:2140:35: error: 'close' was not declared in this scope; did you mean 'simdutf::internal::close'?

EDIT: I'm going to be away for the next 2½ weeks - so until June - so if I don't respond to any further queries on this, that will be why

[andreas-schwab]

Why does that check for host_arch=="arm64" or target_arch=="arm64"?