Fix E2E tests for OSX

[luc-tielen]

When running the e2e tests on OSX, a test failed which checks the generated assembly:

  test/Test/EndToEnd.hs:245:25:
  3) End to end tests, test-data, sum-simple, pipeline-test: sum_simple_exp.grin
       expected: 	.text
                 	.file	"<string>"
                 	.globl	grinMain                # -- Begin function grinMain
                 	.p2align	4, 0x90
                 	.type	grinMain,@function
                 grinMain:                               # @grinMain
                 	.cfi_startproc
                 # %bb.0:                                # %grinMain.entry
                 	movl	$50005000, %edi         # imm = 0x2FB0408
                 	jmp	_prim_int_print         # TAILCALL
                 .Lfunc_end0:
                 	.size	grinMain, .Lfunc_end0-grinMain
                 	.cfi_endproc
                                                         # -- End function
                 	.type	_heap_ptr_,@object      # @_heap_ptr_
                 	.bss
                 	.globl	_heap_ptr_
                 	.p2align	3
                 _heap_ptr_:
                 	.quad	0                       # 0x0
                 	.size	_heap_ptr_, 8


                 	.section	".note.GNU-stack","",@progbits

        but got: 	.section	__TEXT,__text,regular,pure_instructions
                 	.macosx_version_min 10, 13
                 	.globl	_grinMain               ## -- Begin function grinMain
                 	.p2align	4, 0x90
                 _grinMain:                              ## @grinMain
                 	.cfi_startproc
                 ## %bb.0:                               ## %grinMain.entry
                 	movl	$50005000, %edi         ## imm = 0x2FB0408
                 	jmp	__prim_int_print        ## TAILCALL
                 	.cfi_endproc
                                                         ## -- End function
                 	.globl	__heap_ptr_             ## @_heap_ptr_
                 .zerofill __DATA,__common,__heap_ptr_,8,3

                 .subsections_via_symbols

On first look, code seems to be ok (I see the sum constant in the assembly). Should we make it so there are 2 files it can check against depending on current OS?

[andorp]

Checking against the current OS would be sufficient.