[centipede] Fix centipede (#8467)

Pin centipede to a commit that builds.
Also remove 1.3GB of image bloat it adds
CC @ussuri @Alan32Liu 
Fixes #8458

infra/base-images/base-builder/Dockerfile

@@ -116,6 +116,10 @@ RUN git clone https://github.com/AFLplusplus/AFLplusplus.git aflplusplus && \
     wget --no-check-certificate -O oss.sh https://raw.githubusercontent.com/vanhauser-thc/binary_blobs/master/oss.sh && \
     chmod 755 oss.sh
 
+# Do precompiles before copying other scripts for better cache efficiency.
+COPY precompile_afl /usr/local/bin/
+RUN precompile_afl
+
 RUN cd $SRC && \
     curl -L -O https://github.com/google/honggfuzz/archive/oss-fuzz.tar.gz && \
     mkdir honggfuzz && \
@@ -123,16 +127,15 @@ RUN cd $SRC && \
     tar -xzv --strip-components=1 -f $SRC/oss-fuzz.tar.gz && \
     rm -rf examples $SRC/oss-fuzz.tar.gz
 
-RUN cd $SRC && \
-    git clone --depth 1 https://github.com/google/centipede.git
-
-# Do precompiles before copying other scripts for better cache efficiency.
-COPY precompile_afl /usr/local/bin/
-RUN precompile_afl
 
 COPY precompile_honggfuzz /usr/local/bin/
 RUN precompile_honggfuzz
 
+RUN cd $SRC && \
+    git clone https://github.com/google/centipede.git && \
+    cd centipede && \
+    git checkout a976295b2acaff8461a906c461f5bb25dafdf557
+
 COPY precompile_centipede /usr/local/bin/
 RUN precompile_centipede
 

infra/base-images/base-builder/precompile_centipede

@@ -32,4 +32,8 @@ bazel --bazelrc=/tmp/centipede.bazelrc build -c opt :all
 /clang/bin/clang++ "$SRC/centipede/weak_sancov_stubs.cc" -c -o \
   "$SRC/centipede/weak.o"
 
+echo 'Removing extra stuff leftover to avoid bloating image.'
+
+rm -rf /clang-*.tgz /clang /root/.cache/*
+
 echo 'Done.'