8314262: GHA: Cut down cross-compilation sysroots deeper

Backport-of: 38687f1a3eb7d1c2e8aa43b85509ab7999fe0e40

Author: shipilev

.github/workflows/build-cross-compile.yml

@@ -154,7 +154,8 @@ jobs:
           sudo chown ${USER} -R sysroot
           rm -rf sysroot/{dev,proc,run,sys,var}
           rm -rf sysroot/usr/{sbin,bin,share}
-          rm -rf sysroot/usr/lib/{apt,udev,systemd}
+          rm -rf sysroot/usr/lib/{apt,gcc,udev,systemd}
+          rm -rf sysroot/usr/libexec/gcc
         if: steps.get-cached-sysroot.outputs.cache-hit != 'true'
 
       - name: 'Configure'