Currently Makefile test if pixman have configure log, but the script directly
return error if that file do not exist. This patch fix it.
Signed-off-by: NWenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>