startup: Fix build with cmake older than 3.14

Authored by apol on Jun 14 2019, 2:59 PM.

Description

startup: Fix build with cmake older than 3.14

X11::X11 was only added then

Details

Committed
apolJun 14 2019, 2:59 PM
Parents
R120:f0647b712c52: Use a native application for starting plasma
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