[PATCH] CI: Minor updates to buster-gcc-ibt

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

 * Update from GCC 11.2 to 11.3
 * Use python3-minimal instead of python
 * Use --no-install-recommends, requiring ca-certificates, g++-multilib and
   build-essential to be listed explicitly

The resulting container is ~50M smaller

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Michal Orzel <michal.orzel@xxxxxxx>
CC: Doug Goldstein <cardoe@xxxxxxxxxx>
---
 automation/build/debian/buster-gcc-ibt.dockerfile | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/automation/build/debian/buster-gcc-ibt.dockerfile 
b/automation/build/debian/buster-gcc-ibt.dockerfile
index 441d9a9ab37a..96ab4fe8a2f1 100644
--- a/automation/build/debian/buster-gcc-ibt.dockerfile
+++ b/automation/build/debian/buster-gcc-ibt.dockerfile
@@ -4,10 +4,12 @@ ENV DEBIAN_FRONTEND=noninteractive
 ENV USER root
 
 RUN apt-get update && \
-    apt-get --quiet --yes install \
+    apt-get --quiet --yes --no-install-recommends install \
         bison \
         build-essential \
+        ca-certificates \
         flex \
+        g++-multilib \
         libc6-dev-i386 \
         libgmp-dev \
         libisl-dev \
@@ -19,7 +21,7 @@ RUN apt-get update && \
 RUN mkdir /build
 WORKDIR /build
 
-RUN wget -q https://ftp.gnu.org/gnu/gcc/gcc-11.2.0/gcc-11.2.0.tar.xz -O - | 
tar xJ --strip=1
+RUN wget -q https://ftp.gnu.org/gnu/gcc/gcc-11.3.0/gcc-11.3.0.tar.xz -O - | 
tar xJ --strip=1
 RUN wget -q 
https://xenbits.xen.org/people/andrewcoop/gcc-11.2-Add-fcf-check-attribute-yes-no.patch
 -O - | patch -p1
 RUN ./configure \
         --prefix=/opt/gcc-11-ibt \
@@ -53,13 +55,14 @@ RUN mkdir /build
 WORKDIR /build
 
 RUN apt-get update && \
-    apt-get --quiet --yes install \
+    apt-get --quiet --yes --no-install-recommends install \
         bison \
+        build-essential \
         checkpolicy \
         flex \
         gawk \
         make \
-        python3 \
+        python3-minimal \
         && \
         apt-get autoremove -y && \
         apt-get clean && \
-- 
2.30.2