Improve compatibility with new CMake macro

Signed-off-by: Igor Raits <ignatenkobrain@fedoraproject.org>

khotkeys.spec

@@ -1,3 +1,4 @@
+%undefine __cmake_in_source_build
 Name:    khotkeys
 Version: 5.19.3
 Release: 1%{?dist}
@@ -71,19 +72,17 @@ developing applications that use %{name}.
 
 
 %build
-mkdir %{_target_platform}
-pushd %{_target_platform}
-%{cmake_kf5} ..
-popd
+%{cmake_kf5}
+%cmake_build
 
 # hack around FTBFS:
 # make[2]: *** No rule to make target 'app/org.kde.khotkeys.xml', needed by 'kcm_hotkeys/khotkeys_interface.cpp'.  Stop.
-%make_build -C %{_target_platform}/app
-%make_build -C %{_target_platform}
+#make_build -C %{_target_platform}/app
+#make_build -C %{_target_platform}
 
 
 %install
-make install/fast DESTDIR=%{buildroot} -C %{_target_platform}
+%cmake_install
 
 %find_lang khotkeys --with-html