correct kubelet service file permission

[daixiang0]

Fix kubelet service file permission warning

To fix below waring:
7月 26 12:47:58 test-0.localdomain systemd[1]: Configuration file /etc/systemd/system/kubelet.service is marked executable. Please remove executable permission bits. Proceeding anyway.

The service file should be in 644 mode rather than 755.

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[daixiang0]

/assign @mikedanese

[dims]

/ok-to-test

cc @mbohlool

[dims]

/sig release

[daixiang0]

Test seems ok now @dims

[dims]

@daixiang0 looks like we need to patch up https://github.com/kubernetes/release/blob/master/rpm/kubelet.spec#L164 too

[mikedanese]

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: daixiang0, mikedanese

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[daixiang0]

@dims done as kubernetes/release#640

[daixiang0]

@mikedanese @dims I found that %install section will change kubelet.service as 755, so i revert this and create as #69127:

%install

install -m 755 -d %{buildroot}%{_bindir}
install -m 755 -d %{buildroot}%{_sysconfdir}/systemd/system/
install -m 755 -d %{buildroot}%{_sysconfdir}/kubernetes/manifests/
install -p -m 755 -t %{buildroot}%{_bindir} {kubelet}
install -p -m 755 -t %{buildroot}%{_sysconfdir}/systemd/system/ {kubelet.service}  <===