win: prefer amd64_x86 compiler on >= 2013, not just 2013
win: prefer amd64_x86 compiler on >= 2013, not just 2013

[[ Because I always find binary string ops a bit odd:
>>> '2003' >= '2013'
False
>>> '2005' >= '2013'
False
>>> '2008' >= '2013'
False
>>> '2010' >= '2013'
False
>>> '2012' >= '2013'
False
>>> '2013' >= '2013'
True
>>> '2015' >= '2013'
True
>>> '2017' >= '2013'
True
>>> '2090' >= '2013'
True
]]

R=dpranke@chromium.org, thakis@chromium.org
BUG=chromium:482238

Review URL: https://codereview.chromium.org/1112753003

LazyCodingCat/gyp,clar/gyp,Danath/gyp,ryfx/gyp,bulldy80/gyp_unofficial,AWhetter/gyp,Phuehvk/gyp,bnq4ever/gypgoogle,msc-/gyp,turbulenz/gyp,Phuehvk/gyp,bnq4ever/gypgoogle,bulldy80/gyp_unofficial,LazyCodingCat/gyp,azunite/gyp_20150930,bnq4ever/gypgoogle,ttyangf/gyp,bnoordhuis/gyp,chromium/gyp,bulldy80/gyp_unofficial,bnoordhuis/gyp,bnq4ever/gypgoogle,enkripsi/gyp,Danath/gyp,bnoordhuis/gyp,ryfx/gyp,enkripsi/gyp,Phuehvk/gyp,sanyaade-teachings/gyp,turbulenz/gyp,tarc/gyp,yjhjstz/gyp,bulldy80/gyp_unofficial,tarc/gyp,clar/gyp,enkripsi/gyp,chromium/gyp,enkripsi/gyp,enkripsi/gyp,carlTLR/gyp,Jack-Q/GYP-copy,cchamberlain/gyp,pandaxcl/gyp,pandaxcl/gyp,chromium/gyp,chromium/gyp,carlTLR/gyp,amoikevin/gyp,AWhetter/gyp,AWhetter/gyp,amoikevin/gyp,msc-/gyp,clar/gyp,sanyaade-teachings/gyp,pandaxcl/gyp,msc-/gyp,bnoordhuis/gyp,LazyCodingCat/gyp,tarc/gyp,cchamberlain/gyp,clar/gyp,cysp/gyp,amoikevin/gyp,carlTLR/gyp,ryfx/gyp,adblockplus/gyp,cchamberlain/gyp,azunite/gyp_20150930,Danath/gyp,amoikevin/gyp,Jack-Q/GYP-copy,ryfx/gyp,azunite/gyp_20150930,cchamberlain/gyp,azunite/gyp_20150930,AWhetter/gyp,ttyangf/gyp,pandaxcl/gyp,sanyaade-teachings/gyp,cchamberlain/gyp,msc-/gyp,carlTLR/gyp,tarc/gyp,Jack-Q/GYP-copy,yjhjstz/gyp,AWhetter/gyp,LazyCodingCat/gyp,yjhjstz/gyp,adblockplus/gyp,pandaxcl/gyp,ttyangf/gyp,yjhjstz/gyp,turbulenz/gyp,turbulenz/gyp,Phuehvk/gyp,chromium/gyp,msc-/gyp,yjhjstz/gyp,ttyangf/gyp,LazyCodingCat/gyp,sanyaade-teachings/gyp,bnq4ever/gypgoogle,Danath/gyp,Phuehvk/gyp,adblockplus/gyp,azunite/gyp_20150930,tarc/gyp,bnoordhuis/gyp,ryfx/gyp,cysp/gyp,turbulenz/gyp,Jack-Q/GYP-copy,Jack-Q/GYP-copy,clar/gyp,sanyaade-teachings/gyp,cysp/gyp,cysp/gyp,amoikevin/gyp,Danath/gyp,ttyangf/gyp,cysp/gyp,adblockplus/gyp,carlTLR/gyp,bulldy80/gyp_unofficial,adblockplus/gyp