nasm test: Add a test for validating the Xcode backend

test cases/nasm/4 through configure/dummy.asm.in

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+global dummy
+section .rodata align=16
+dummy:
+  dd 0x00010203

test cases/nasm/4 through configure/dummy.def

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+EXPORTS
+	dummy

test cases/nasm/4 through configure/meson.build

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+project('through configure')
+
+if not add_languages('nasm', required: false)
+  error('MESON_SKIP_TEST: nasm not found')
+endif
+
+if not host_machine.cpu_family().startswith('x86')
+  assert(not add_languages('nasm', required: false))
+  error('MESON_SKIP_TEST: nasm only supported for x86 and x86_64')
+endif
+
+if meson.backend().startswith('vs')
+  error('MESON_SKIP_TEST: VS backend does not recognise NASM yet')
+endif
+
+section = host_machine.system() == 'macos' ? '.rodata' : '.rdata'  
+
+sources = configure_file(
+  input: 'dummy.asm.in',
+  output: 'dummy.asm',
+  configuration: {
+    'section': section
+  }
+)
+
+dummy = library(
+    'dummy',
+    sources,
+    vs_module_defs: 'dummy.def',
+)