CI: print out GCC version.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Author: rustyrussell

.github/scripts/setup.sh

@@ -62,6 +62,9 @@ sudo chmod 0440 /etc/sudoers.d/tester
 
 "$(dirname "$0")"/install-bitcoind.sh
 
+echo "gcc --version":
+gcc --version
+
 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- \
      -y --default-toolchain ${RUST_VERSION}