[QBS] static library dependency always recompiles

[arturo castro]

i'm trying now to set the library in cpp.staticLibraries or directly the
full path to the .a as a cpp.linkerFlags but the project won't detect if
the library has changed.

if i modify the library and recompile it, then run the project it will
just run as if nothing had changed, it won't link the new version of the
library.

is there any way to set a file as a dependency with the cpp module? so
when it changes the project recompiles or relinks?