This broke when the tests were moved from tests/ to tests/tcg/.

On x86_64 host/i386-linux-user non-kvm guest, test-i386 and test-mmap are broken, but at least they build.

To build/run the tests:
$ cd $BUILD_PATH/tests/tcg
$ SRC_PATH=path/to/qemu make <target>
Signed-off-by: NCatalin Patulea <catalinp@google.com>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>