test: nasm-t -- Add inctest

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

travis/test/inc1.asm

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+; This file is part of the include test.
+; See inctest.asm for build instructions.
+
+message:  db 'hello, world',13,10,'$'
+
+%include "inc2.asm"

travis/test/inc2.asm

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+; This file is part of the include test.
+; See inctest.asm for build instructions.
+
+_main:	  mov dx,message
+	  mov ah,9
+	  int 21h
+	  mov ax,4c00h
+	  int 21h

travis/test/inctest.asm

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+; This file, plus inc1.asm and inc2.asm, test NASM's file inclusion
+; mechanism.
+;
+; This produces a DOS .COM file: to assemble, use
+;    nasm -f bin inctest.asm -o inctest.com
+; and when run, it should print `hello, world'.
+
+	  BITS 16
+	  ORG 0x100
+
+	  jmp _main
+
+%include "inc1.asm"

travis/test/inctest.json

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+[
+	{
+		"description": "Test include directive",
+		"id": "inctest",
+		"format": "bin",
+		"source": "inctest.asm",
+		"option": "-i./travis/test/",
+		"target": [
+			{ "output": "inctest.com" }
+		]
+	}
+]