Update cmake to 3.15.4
Fix: In CMake 3.15.0 through 3.15.3, the EXCLUDE_FROM_ALL directory property was regressed from pre-3.14 behavior and caused targets within the directory to be excluded even from its own “all”.
Signed-off-by: Pierre-Yves <firstname.lastname@example.org>
Test Plan: Build krita
Reviewers: Triage Team, JoshStrobl
Reviewed By: Triage Team, JoshStrobl
Differential Revision: https://dev.getsol.us/D7301