docs: GCC toolchain upgrade to version 9.2-2019.12
This toolchain provides multiple cross compilers and are publicly
available on developer.arm.com

We build TF-A in CI using:
AArch32 bare-metal target (arm-none-eabi)
AArch64 ELF bare-metal target (aarch64-none-elf)

Change-Id: I910200174d5bad985504d1af4a1ae5819b524003
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
1 parent 22d12c4 commit f35e5ab39cc9e107779a5bc673e6159cd119aee0
@Madhukar Pappireddy Madhukar Pappireddy authored on 10 Jan 2020
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docs/getting_started/initial-build.rst
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docs/getting_started/prerequisites.rst
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docs/plat/arm/fvp/index.rst
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docs/plat/arm/juno/index.rst