Build libgccjit for all CI testsuites using it

src/ci/docker/host-x86_64/x86_64-gnu-llvm-16/Dockerfile

@@ -24,7 +24,12 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   xz-utils \
   nodejs \
   mingw-w64 \
-  libgccjit-12-dev \
+  # libgccjit dependencies
+  flex \
+  libmpfr-dev \
+  libgmp-dev \
+  libmpc3 \
+  libmpc-dev \
   && rm -rf /var/lib/apt/lists/*
 
 # Note: libgccjit needs to match the default gcc version for the linker to find it.
@@ -54,4 +59,9 @@ ENV RUST_CONFIGURE_ARGS \
 
 COPY host-x86_64/x86_64-gnu-llvm-16/script.sh /tmp/
 
+COPY host-x86_64/dist-x86_64-linux/libgccjit.version /scripts/
+COPY host-x86_64/dist-x86_64-linux/build-gccjit.sh /scripts/
+
+RUN sh /scripts/build-gccjit.sh /scripts
+
 ENV SCRIPT /tmp/script.sh

src/ci/docker/host-x86_64/x86_64-gnu-llvm-17/Dockerfile

@@ -24,11 +24,14 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   xz-utils \
   nodejs \
   mingw-w64 \
-  libgccjit-13-dev \
+  # libgccjit dependencies
+  flex \
+  libmpfr-dev \
+  libgmp-dev \
+  libmpc3 \
+  libmpc-dev \
   && rm -rf /var/lib/apt/lists/*
 
-# Note: libgccjit needs to match the default gcc version for the linker to find it.
-
 # Install powershell (universal package) so we can test x.ps1 on Linux
 RUN curl -sL "https://github.com/PowerShell/PowerShell/releases/download/v7.3.1/powershell_7.3.1-1.deb_amd64.deb" > powershell.deb && \
     dpkg -i powershell.deb && \
@@ -51,4 +54,9 @@ ENV RUST_CONFIGURE_ARGS \
 
 COPY host-x86_64/x86_64-gnu-llvm-16/script.sh /tmp/
 
+COPY host-x86_64/dist-x86_64-linux/libgccjit.version /scripts/
+COPY host-x86_64/dist-x86_64-linux/build-gccjit.sh /scripts/
+
+RUN sh /scripts/build-gccjit.sh /scripts
+
 ENV SCRIPT /tmp/script.sh