[Qt-creator] : CMake and multiple targets in CMakeLists.txt

[Gena Cid]

Hello!

I've found a tiny bug when tried Qt-creator on subj. Everything is just fine, 
but build steps contains two target: my custom target and 'all' (looks like 
'make all <my custom target>'). After uncheck and check again <my custom target> 
in the Targets list 'all' disappeared and everything is works as expected.

P.S. Use qt-creator-linux-x86_64-opensource-1.2.90

-----|-
Гена.