manibuilder/centos: Disable TLS verification for Git commands

Pull the `ca-certificates` package but also disable certificate
verification for Git commands, including those that run during
tests. At some point, the `ca-certificates` won't get updates
anymore and, ideally, existing docker images will keep working.

Change-Id: I6bc2a85c67b84e89656fe5d7191d354c2f97ff05
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66982
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
---
M util/manibuilder/Dockerfile.centos
1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/util/manibuilder/Dockerfile.centos b/util/manibuilder/Dockerfile.centos
index fcae9c8..16ea921 100644
--- a/util/manibuilder/Dockerfile.centos
+++ b/util/manibuilder/Dockerfile.centos
@@ -2,9 +2,11 @@
 
 RUN \
 	useradd -p locked -m mani && \
-	yum install -q -y git gcc pciutils-devel libusb-devel libusbx-devel && \
+	yum install -q -y ca-certificates git gcc \
+			  pciutils-devel libusb-devel libusbx-devel && \
 	yum clean -q -y all
 
+ENV GIT_SSL_NO_VERIFY=1
 USER mani
 RUN \
 	cd && \

