Update V8 deps for PRODUCT_PREBUILT_WEBVIEWCHROMIUM.
Update V8 deps for PRODUCT_PREBUILT_WEBVIEWCHROMIUM.

When using a prebuilt chromium, the build was failing as the set of V8
makefiles being included is no longer correct with the M39 version of
Chromium. Remove generate_trig_table which no longer exists, and add
v8_libplatform which is a new dependency required to build the host
mksnapshot binary.

Bug: 18675666
Change-Id: Ic00eea284a5b40af41883e000e092ee16d6bfcc7

TeamExodus/external_chromium_org,FusionSP/android_external_chromium_org,GladeRom/android_external_chromium_org,GladeRom/android_external_chromium_org,xsynergy510x/android_external_chromium_org,byterom/android_external_chromium_org,omnirom/android_external_chromium-org,geekboxzone/lollipop_external_chromium_org,TeamExodus/external_chromium_org,TeamTwisted/external_chromium_org,Fusion-Rom/android_external_chromium_org,TeslaProject/external_chromium_org,TeslaProject/external_chromium_org,Fusion-Rom/android_external_chromium_org,OptiPop/external_chromium_org,Fusion-Rom/android_external_chromium_org,laperry1/android_external_chromium_org,FusionSP/android_external_chromium_org,Omegaphora/external_chromium_org,sudosurootdev/external_chromium_org,TeslaProject/external_chromium_org,TeslaProject/external_chromium_org,android-ia/platform_external_chromium_org,Fusion-Rom/android_external_chromium_org,SOKP/external_chromium_org,android-ia/platform_external_chromium_org,FusionSP/android_external_chromium_org,android-ia/platform_external_chromium_org,DARKPOP/external_chromium_org,xsynergy510x/android_external_chromium_org,OptiPop/external_chromium_org,sudosurootdev/external_chromium_org,DirtyUnicorns/android_external_chromium_org,xsynergy510x/android_external_chromium_org,xsynergy510x/android_external_chromium_org,omnirom/android_external_chromium-org,laperry1/android_external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,SOKP/external_chromium_org,SlimRemix/android_external_chromium_org,Omegaphora/external_chromium_org,TeamTwisted/external_chromium_org,mydongistiny/external_chromium_org,Omegaphora/external_chromium_org,DirtyUnicorns/android_external_chromium_org,GladeRom/android_external_chromium_org,SOKP/external_chromium_org,omnirom/android_external_chromium-org,sudosurootdev/external_chromium_org,FusionSP/android_external_chromium_org,android-ia/platform_external_chromium_org,TeamTwisted/external_chromium_org,byterom/android_external_chromium_org,omnirom/android_external_chromium-org,SOKP/external_chromium_org,omnirom/android_external_chromium-org,xsynergy510x/android_external_chromium_org,SOKP/external_chromium_org,TeamExodus/external_chromium_org,Omegaphora/external_chromium_org,omnirom/android_external_chromium-org,DARKPOP/external_chromium_org,SlimRemix/android_external_chromium_org,laperry1/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,laperry1/android_external_chromium_org,jgcaaprom/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,xsynergy510x/android_external_chromium_org,jgcaaprom/android_external_chromium_org,FusionSP/android_external_chromium_org,OptiPop/external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,Omegaphora/external_chromium_org,GladeRom/android_external_chromium_org,Omegaphora/external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,DirtyUnicorns/android_external_chromium_org,TeslaProject/external_chromium_org,mydongistiny/external_chromium_org,sudosurootdev/external_chromium_org,android-ia/platform_external_chromium_org,TeslaProject/external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,DARKPOP/external_chromium_org,SlimRemix/android_external_chromium_org,laperry1/android_external_chromium_org,omnirom/android_external_chromium-org,jgcaaprom/android_external_chromium_org,mydongistiny/external_chromium_org,TeamTwisted/external_chromium_org,xsynergy510x/android_external_chromium_org,Omegaphora/external_chromium_org,FusionSP/android_external_chromium_org,mydongistiny/external_chromium_org,Fusion-Rom/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,sudosurootdev/external_chromium_org,TeamTwisted/external_chromium_org,OptiPop/external_chromium_org,Fusion-Rom/android_external_chromium_org,jgcaaprom/android_external_chromium_org,laperry1/android_external_chromium_org,Omegaphora/external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,android-ia/platform_external_chromium_org,geekboxzone/lollipop_external_chromium_org,DARKPOP/external_chromium_org,SOKP/external_chromium_org,TeamExodus/external_chromium_org,SlimRemix/android_external_chromium_org,Omegaphora/external_chromium_org,DARKPOP/external_chromium_org,TeslaProject/external_chromium_org,byterom/android_external_chromium_org,sudosurootdev/external_chromium_org,TeamTwisted/external_chromium_org,TeamExodus/external_chromium_org,xsynergy510x/android_external_chromium_org,DirtyUnicorns/android_external_chromium_org,SOKP/external_chromium_org,DirtyUnicorns/android_external_chromium_org,byterom/android_external_chromium_org,jgcaaprom/android_external_chromium_org,android-ia/platform_external_chromium_org,Fusion-Rom/android_external_chromium_org,TeamExodus/external_chromium_org,mydongistiny/external_chromium_org,DirtyUnicorns/android_external_chromium_org,TeamExodus/external_chromium_org,FusionSP/android_external_chromium_org,sudosurootdev/external_chromium_org,android-ia/platform_external_chromium_org,mydongistiny/external_chromium_org,laperry1/android_external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,byterom/android_external_chromium_org,SlimRemix/android_external_chromium_org,jgcaaprom/android_external_chromium_org,jgcaaprom/android_external_chromium_org,Fusion-Rom/android_external_chromium_org,jgcaaprom/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,SlimRemix/android_external_chromium_org,byterom/android_external_chromium_org,GladeRom/android_external_chromium_org,SOKP/external_chromium_org,android-ia/platform_external_chromium_org,Omegaphora/external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,mydongistiny/external_chromium_org,OptiPop/external_chromium_org,SlimRemix/android_external_chromium_org,FusionSP/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,FusionSP/android_external_chromium_org,TeamTwisted/external_chromium_org,DARKPOP/external_chromium_org,Plain-Andy-legacy/android_external_chromium_org,GladeRom/android_external_chromium_org,android-ia/platform_external_chromium_org,TeamTwisted/external_chromium_org,byterom/android_external_chromium_org,SOKP/external_chromium_org,byterom/android_external_chromium_org,byterom/android_external_chromium_org,TeamTwisted/external_chromium_org,OptiPop/external_chromium_org,FusionSP/android_external_chromium_org,DARKPOP/external_chromium_org,laperry1/android_external_chromium_org,OptiPop/external_chromium_org,sudosurootdev/external_chromium_org,DirtyUnicorns/android_external_chromium_org,byterom/android_external_chromium_org,Fusion-Rom/android_external_chromium_org,omnirom/android_external_chromium-org,laperry1/android_external_chromium_org,mydongistiny/external_chromium_org,TeamExodus/external_chromium_org,SOKP/external_chromium_org,xsynergy510x/android_external_chromium_org,TeamExodus/external_chromium_org,GladeRom/android_external_chromium_org,DirtyUnicorns/android_external_chromium_org,sudosurootdev/external_chromium_org,laperry1/android_external_chromium_org,DARKPOP/external_chromium_org,OptiPop/external_chromium_org,GladeRom/android_external_chromium_org,GladeRom/android_external_chromium_org,xsynergy510x/android_external_chromium_org,sudosurootdev/external_chromium_org,jgcaaprom/android_external_chromium_org,GladeRom/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,mydongistiny/external_chromium_org,TeslaProject/external_chromium_org,mydongistiny/external_chromium_org,TeslaProject/external_chromium_org,OptiPop/external_chromium_org,jgcaaprom/android_external_chromium_org,Fusion-Rom/android_external_chromium_org,DARKPOP/external_chromium_org,SlimRemix/android_external_chromium_org,SlimRemix/android_external_chromium_org,geekboxzone/lollipop_external_chromium_org,TeamExodus/external_chromium_org,OptiPop/external_chromium_org,DirtyUnicorns/android_external_chromium_org,SlimRemix/android_external_chromium_org,TeamTwisted/external_chromium_org,DirtyUnicorns/android_external_chromium_org,DARKPOP/external_chromium_org,TeslaProject/external_chromium_org