account for the missing "kernel-tfg/extra-configs" dir if it is empty

configure-linux.sh

@@ -2,4 +2,4 @@
 
 set -xeu
 
-find ./extra-configs -name "*.sh" -exec "{}" \; || echo "Extra configs not found, not modifying anything"
+find ./extra-configs -name "*.sh" -exec "{}" \;

master.inc

@@ -97,9 +97,13 @@ export LLVM=1 AR=llvm-ar CC=clang HOSTAR=llvm-ar HOSTCC=clang HOSTCXX=clang++ HO
 %{make} defconfig
 
 tar -xf %{SOURCE2} -C .
+if [ -d 'kernel-tfg/extra-configs' ]; then
     cp -vr kernel-tfg/{configure-linux.sh,extra-configs} .
     rm -rf kernel-tfg/
     ./configure-linux.sh
+else
+    echo "Extra configs not found, not modifying anything"
+fi
 
 %build
 %{make} PYTHON=%{__python3} %{make_targets}