build: donot rename built app binary

earlier the qmake build always produced the binary named
as bitmask and later it was renamed to whatever PROVIDER
was set to, in the previous commit we fixed the  setting
of TARGET env so that qmake produces the binary with the
correct name

gui/build.sh

@@ -139,7 +139,6 @@ function buildDefault {
     $MAKE -C $QTBUILD clean
     $MAKE -C $QTBUILD $MAKEFLAGS all
 
-    renameOutput
     echo "[+] Done."
 }