Reorganize resources/ + wasm target (#1244)

* add README.md to resources directory
* add cross/ directory for meson cross files
* fix readme list syntax error
* fix reflink
* disable ASYNCIFY_ADVISE by default
* use executable names instead of hardcoding paths

resources/macos/macos_arm64.conf

@@ -1,24 +0,0 @@
-[host_machine]
-system = 'darwin'
-cpu_family = 'aarch64'
-cpu = 'arm64'
-endian = 'little'
-
-[binaries]
-c = ['clang']
-cpp = ['clang++']
-objc = ['clang']
-objcpp = ['clang++']
-ar = ['ar']
-strip = ['strip']
-pkgconfig = ['pkg-config']
-
-[built-in options]
-c_args = ['-arch', 'arm64']
-cpp_args = ['-stdlib=libc++', '-arch', 'arm64']
-objc_args = ['-arch', 'arm64']
-objcpp_args = ['-stdlib=libc++', '-arch', 'arm64']
-c_link_args = ['-arch', 'arm64']
-cpp_link_args = ['-arch', 'arm64']
-objc_link_args = ['-arch', 'arm64']
-objcpp_link_args = ['-arch', 'arm64']