qmake_base.bbclass: Add linux-gnun32-oe-g++ to QMAKESPEC
For some mips targets, TARGET_OS is set to linux-gnun32, while
linux-gnun32-oe-g++ is not listed in the default QMAKESPEC list of
qmake in oe-core/wrlinux. This would cause build failures for qt
apps, so add a matching rule to fix this.
Signed-off-by: Xin Ouyang <Xin.Ouyang@windriver.com> Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com> Signed-off-by: Mark Hatle <mark.hatle@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
