redhat: workaround CKI cross compilation for scripts

Bugzilla: INTERNAL
Upstream Status: RHEL only

I am only reapplying the kernel.spec.template change in
2c0c8979e9 ("redhat: workaround CKI cross compilation for scripts")
to avoid issues with the CKI BZ bot.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>

redhat/kernel.spec.template

@@ -2151,6 +2151,11 @@ BuildKernel() {
     rm -f $RPM_BUILD_ROOT/mod-partner.list
 %endif
 
+%if %{with_cross}
+    make -C $RPM_BUILD_ROOT/lib/modules/$KernelVer/build M=scripts clean
+    sed -i 's/REBUILD_SCRIPTS_FOR_CROSS:=0/REBUILD_SCRIPTS_FOR_CROSS:=1/' $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/Makefile
+%endif
+
     # Move the devel headers out of the root file system
     mkdir -p $RPM_BUILD_ROOT/usr/src/kernels
     mv $RPM_BUILD_ROOT/lib/modules/$KernelVer/build $RPM_BUILD_ROOT/$DevelDir
@@ -2734,6 +2739,10 @@ then\
      /usr/bin/find /usr/src/kernels -type f -name '*.hardlink-temporary' -delete\
     )\
 fi\
+%if %{with_cross}\
+    echo "Building scripts"\
+    env --unset=ARCH make -C /usr/src/kernels/%{KVERREL}%{?1:+%{1}} prepare_after_cross\
+%endif\
 %{nil}
 
 #