Improve compatibility with new CMake macro

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

kde-connect.spec

@@ -1,4 +1,4 @@
-
+%undefine __cmake_in_source_build
 # enable experimental (default off) bluetooth support
 #global bluetooth 1
 
@@ -117,17 +117,13 @@ Supplements: (kdeconnectd and nautilus)
 
 
 %build
-mkdir %{_target_platform}
+%{cmake_kf5} \
-pushd %{_target_platform}
-%{cmake_kf5} .. \
   %{?bluetooth:-DBLUETOOTH_ENABLED:BOOL=ON}
-popd
+%cmake_build
-
-%make_build -C %{_target_platform}
 
 
 %install
-make install/fast DESTDIR=%{buildroot} -C %{_target_platform}
+%cmake_install
 
 # firewalld as shipped in f31+ provides it's own kdeconnect.xml
 %if 0%{?fedora} && 0%{?fedora} < 31