bump linaro version platforms to 20.01

This is the versions currently being used by CI scripts.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I56962709eee0a1cfc5c76274d957aab3ee768eca
diff --git a/bionic-amd64-tf-a-build/Dockerfile b/bionic-amd64-tf-a-build/Dockerfile
index e6913cd..ad24cc7 100644
--- a/bionic-amd64-tf-a-build/Dockerfile
+++ b/bionic-amd64-tf-a-build/Dockerfile
@@ -119,7 +119,7 @@
             -d ${TOOLS_DIR} \
     && rm -rf ${ARM_CLANG_INSTALL_DIR} /tmp/${ARM_CLANG_TAR}
 
-ARG LINARO_VERSION=19.06
+ARG LINARO_VERSION=20.01
 RUN mkdir -p nfs/downloads/linaro/${LINARO_VERSION} \
     && cd nfs/downloads/linaro/${LINARO_VERSION} \
     && wget -q -c -m -A .zip -np -nd https://releases.linaro.org/members/arm/platforms/${LINARO_VERSION}/ \