Fix build with gcc 8 and newer#1

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NHellFire wants to merge 3 commits intolinuxboot:UDK2018from

NHellFire:patch/UDK2018/gcc8-fix

Commits on Sep 29, 2020

BaseTools/header.makefile: add "-Wno-stringop-truncation"

Laszlo Ersek
authored and
NHellFire
committed

Commits on Sep 30, 2020

BaseTools/GenVtf: silence false "stringop-overflow" warning with memcpy()

Laszlo Ersek
authored and
NHellFire
committed

Commits on Oct 1, 2020

BaseTools tools_def.template: Add GCC link script option in ASLDLINK_FLAGS

lgao4
authored and
NHellFire
committed