OE assumes that mingw files are in a unix like file layout. The
'flattening' done by configure in qemu for mingw32 breaks things
for us. We are discussing with upstream but for now, hack this to
disable it and use the unix like layout everywhere.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Upstream-Status: Submitted [https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg01073.html]

Index: qemu-5.2.0/configure
===================================================================
--- qemu-5.2.0.orig/configure
+++ qemu-5.2.0/configure
@@ -1541,7 +1541,7 @@ libdir="${libdir:-$prefix/lib}"
 libexecdir="${libexecdir:-$prefix/libexec}"
 includedir="${includedir:-$prefix/include}"
 
-if test "$mingw32" = "yes" ; then
+if test "$mingw32" = "dontwantthis" ; then
     mandir="$prefix"
     datadir="$prefix"
     docdir="$prefix"