Meta: Change the QEMU binary directory to Toolchain/Local/qemu

Previously we'd place the QEMU binaries into the architecture-specific
toolchain directory. This is a problem because the BuildIt.sh script
clears those directories which also removes the QEMU binaries users
may have built earlier. Also, the QEMU binaries are not specific to
the target architecture.

Toolchain/BuildQemu.sh

@@ -7,8 +7,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 echo "$DIR"
 
-ARCH=${ARCH:-"i686"}
-PREFIX="$DIR/Local/$ARCH"
+PREFIX="$DIR/Local/qemu"
 BUILD=$(realpath "$DIR/../Build")
 SYSROOT="$BUILD/Root"
 
@@ -46,7 +45,7 @@ pushd "$DIR/Tarballs"
 popd
 
 mkdir -p "$PREFIX"
-mkdir -p "$DIR/Build/$ARCH/qemu"
+mkdir -p "$DIR/Build/qemu"
 
 if [ -z "$MAKEJOBS" ]; then
     MAKEJOBS=$(nproc)
@@ -61,12 +60,10 @@ fi
 
 echo Using $UI_LIB based UI
 
-pushd "$DIR/Build/$ARCH"
-    pushd qemu
-        "$DIR"/Tarballs/$QEMU_VERSION/configure --prefix="$PREFIX" \
-                                                --target-list=i386-softmmu,x86_64-softmmu \
-                                                --enable-$UI_LIB || exit 1
-        make -j "$MAKEJOBS" || exit 1
-        make install || exit 1
-    popd
+pushd "$DIR/Build/qemu"
+    "$DIR"/Tarballs/$QEMU_VERSION/configure --prefix="$PREFIX" \
+                                            --target-list=i386-softmmu,x86_64-softmmu \
+                                            --enable-$UI_LIB || exit 1
+    make -j "$MAKEJOBS" || exit 1
+    make install || exit 1
 popd