qmake (from Qt 3) creates makefiles that strip all executables during
installation.  The generated rule looks like this:

install_target: all
         @$(CHK_DIR_EXISTS) "$(INSTALL_ROOT)/lib64/" || $(MKDIR)
"$(INSTALL_ROOT)/lib64/"
         -$(INSTALL_FILE) "$(QMAKE_TARGET)"
"$(INSTALL_ROOT)/lib64/$(QMAKE_TARGET)"
         -strip "$(INSTALL_ROOT)/lib64/$(QMAKE_TARGET)"

This results in portage issuing a QA warning during the emerge (portage
wants to strip the executables itself).  What would be a good way to fix
that?