[test][aat] fix 10.13.6 Helvetica expectation

test/shaping/data/in-house/tests/macos.tests

@@ -14,7 +14,7 @@
 /System/Library/Fonts/SFNSDisplay.ttf@92787c30716672737e9059bc367c15d04fbc1ced::U+0056,U+0041,U+0056,U+0041:[gid265=0+1227|gid4=1@-65,0+1162|gid265=2@-65,0+1162|gid4=3@-65,0+1227]
 
 # 10.13.6
-/System/Library/Fonts/Helvetica.ttc@8a928f9866299d2455f41360202b7a3b48503a5e::U+006D,U+0300:[m=0+1422|gravecmb=0@0,96+283]
+/System/Library/Fonts/Helvetica.ttc@8a928f9866299d2455f41360202b7a3b48503a5e::U+006D,U+0300:[m=0+1706|gravecmb=0@-284,10+0]
 /System/Library/Fonts/LucidaGrande.ttc@63ba1b1de4709bd832ca76bd62368dd99fc34269::U+006D,U+0300:[mgrave=0+1912]
 /System/Library/Fonts/Times.ttc@896098b6979306ad84355025459f7c68b029139c::U+0066,U+0069:[fi=0+1139]
 /Library/Fonts/Khmer MN.ttc@782ba6cf3fca0512ab348dfe08345a2d5dc5bf2c::U+17A2,U+1780,U+17D2,U+179F,U+179A,U+1781,U+17D2,U+1798,U+17C2,U+179A:[km_qa=0+1025|km_ka=1+1025|km_sa.sub=1+517|km_ro=4+593|km_vs_ae=5+605|km_kha=5+1025|km_mo.sub=5+0|km_ro=9+593]