Remove references to out/Debug/tests executable.
Remove references to out/Debug/tests executable.

This target does not exists anymore, it was folded into out/Debug/dm.
You can't do `ninja -C out/Debug tests` either anymore.

BUG=None
TEST=None
R=mtklein@google.com

Review URL: https://codereview.chromium.org/638913005

geekboxzone/mmallow_external_skia,chenlian2015/skia_from_google,UBERMALLOW/external_skia,ominux/skia,todotodoo/skia,noselhq/skia,timduru/platform-external-skia,MarshedOut/android_external_skia,TeamTwisted/external_skia,Infinitive-OS/platform_external_skia,DiamondLovesYou/skia-sys,MonkeyZZZZ/platform_external_skia,google/skia,timduru/platform-external-skia,pcwalton/skia,OneRom/external_skia,w3nd1go/android_external_skia,aosp-mirror/platform_external_skia,chenlian2015/skia_from_google,MinimalOS-AOSP/platform_external_skia,amyvmiwei/skia,w3nd1go/android_external_skia,Hikari-no-Tenshi/android_external_skia,MinimalOS-AOSP/platform_external_skia,UBERMALLOW/external_skia,PAC-ROM/android_external_skia,samuelig/skia,todotodoo/skia,w3nd1go/android_external_skia,MonkeyZZZZ/platform_external_skia,MinimalOS-AOSP/platform_external_skia,rubenvb/skia,Infinitive-OS/platform_external_skia,geekboxzone/mmallow_external_skia,TeamExodus/external_skia,boulzordev/android_external_skia,MarshedOut/android_external_skia,Hikari-no-Tenshi/android_external_skia,PAC-ROM/android_external_skia,jtg-gg/skia,pcwalton/skia,OneRom/external_skia,rubenvb/skia,Infinitive-OS/platform_external_skia,invisiblek/android_external_skia,OneRom/external_skia,PAC-ROM/android_external_skia,Jichao/skia,Hikari-no-Tenshi/android_external_skia,BrokenROM/external_skia,Jichao/skia,boulzordev/android_external_skia,MonkeyZZZZ/platform_external_skia,TeamTwisted/external_skia,Igalia/skia,TeamExodus/external_skia,Igalia/skia,Igalia/skia,Hikari-no-Tenshi/android_external_skia,timduru/platform-external-skia,google/skia,nfxosp/platform_external_skia,shahrzadmn/skia,VRToxin-AOSP/android_external_skia,nvoron23/skia,ominux/skia,timduru/platform-external-skia,boulzordev/android_external_skia,tmpvar/skia.cc,AOSPB/external_skia,samuelig/skia,scroggo/skia,TeamTwisted/external_skia,AOSP-YU/platform_external_skia,boulzordev/android_external_skia,shahrzadmn/skia,AOSP-YU/platform_external_skia,amyvmiwei/skia,OneRom/external_skia,shahrzadmn/skia,nvoron23/skia,PAC-ROM/android_external_skia,PAC-ROM/android_external_skia,jtg-gg/skia,scroggo/skia,Igalia/skia,boulzordev/android_external_skia,scroggo/skia,jtg-gg/skia,rubenvb/skia,nfxosp/platform_external_skia,Hikari-no-Tenshi/android_external_skia,Igalia/skia,MarshedOut/android_external_skia,geekboxzone/mmallow_external_skia,tmpvar/skia.cc,samuelig/skia,todotodoo/skia,AOSPB/external_skia,DiamondLovesYou/skia-sys,vanish87/skia,geekboxzone/mmallow_external_skia,HalCanary/skia-hc,TeamExodus/external_skia,nvoron23/skia,aosp-mirror/platform_external_skia,tmpvar/skia.cc,vanish87/skia,UBERMALLOW/external_skia,OneRom/external_skia,Infinitive-OS/platform_external_skia,aosp-mirror/platform_external_skia,scroggo/skia,UBERMALLOW/external_skia,tmpvar/skia.cc,aosp-mirror/platform_external_skia,qrealka/skia-hc,invisiblek/android_external_skia,ominux/skia,spezi77/android_external_skia,UBERMALLOW/external_skia,OneRom/external_skia,google/skia,TeamTwisted/external_skia,VRToxin-AOSP/android_external_skia,chenlian2015/skia_from_google,shahrzadmn/skia,OneRom/external_skia,BrokenROM/external_skia,shahrzadmn/skia,TeamTwisted/external_skia,VRToxin-AOSP/android_external_skia,BrokenROM/external_skia,invisiblek/android_external_skia,Jichao/skia,google/skia,PAC-ROM/android_external_skia,MonkeyZZZZ/platform_external_skia,DiamondLovesYou/skia-sys,Igalia/skia,MinimalOS-AOSP/platform_external_skia,noselhq/skia,MonkeyZZZZ/platform_external_skia,chenlian2015/skia_from_google,rubenvb/skia,invisiblek/android_external_skia,VRToxin-AOSP/android_external_skia,OneRom/external_skia,geekboxzone/mmallow_external_skia,amyvmiwei/skia,Infinitive-OS/platform_external_skia,chenlian2015/skia_from_google,Infinitive-OS/platform_external_skia,pcwalton/skia,shahrzadmn/skia,PAC-ROM/android_external_skia,noselhq/skia,invisiblek/android_external_skia,MinimalOS-AOSP/platform_external_skia,vanish87/skia,w3nd1go/android_external_skia,AOSP-YU/platform_external_skia,samuelig/skia,qrealka/skia-hc,todotodoo/skia,pcwalton/skia,AOSPB/external_skia,MinimalOS-AOSP/platform_external_skia,rubenvb/skia,boulzordev/android_external_skia,nfxosp/platform_external_skia,aosp-mirror/platform_external_skia,TeamTwisted/external_skia,MonkeyZZZZ/platform_external_skia,chenlian2015/skia_from_google,geekboxzone/mmallow_external_skia,invisiblek/android_external_skia,rubenvb/skia,pcwalton/skia,HalCanary/skia-hc,ominux/skia,TeamTwisted/external_skia,nvoron23/skia,tmpvar/skia.cc,nfxosp/platform_external_skia,HalCanary/skia-hc,qrealka/skia-hc,YUPlayGodDev/platform_external_skia,spezi77/android_external_skia,jtg-gg/skia,nvoron23/skia,qrealka/skia-hc,Hikari-no-Tenshi/android_external_skia,TeamExodus/external_skia,todotodoo/skia,YUPlayGodDev/platform_external_skia,qrealka/skia-hc,aosp-mirror/platform_external_skia,amyvmiwei/skia,OneRom/external_skia,AOSPB/external_skia,geekboxzone/mmallow_external_skia,BrokenROM/external_skia,Jichao/skia,PAC-ROM/android_external_skia,MarshedOut/android_external_skia,Jichao/skia,nfxosp/platform_e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