nativesdk-qtbase: do qmake replacement in ${D} instead of ${B}

* This way we don't mangle ${B} and can repeat do_install if necessary. And
  previously it would require running do_compile again to restore the proper
  state of ${B}.
* Need to bump PR, since do_compile isn't changing, but needs to re-run to
  re-populate qmake-real binary.

Signed-off-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>