It's typical to prepend or append parameters to an argument string so
that other places in ./configure can add parameters without clobbering
the string.  In the mingw32 libs_qga case there is a typo "$lib_qga"
instead of "$libs_qga".
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Reviewed-by: NAndreas Färber <afaerber@suse.de>