qemu-config: use pkg_postinst to generate the proper shutdown.desktop

[YOCTO #1507]

We need to remove the file qemuarm/shutdown.desktop, or else, on qemuarm,
due to the PACKAGE_ARCH overriding from all to qemuarm in base.bbclass,
the generated deb file will be stored at
tmp/deploy/deb/qemuarm/qemu-config_1.0-r21_allarch.deb rather than
tmp/deploy/deb/all/qemu-config_1.0-r21_all.deb, and the package qemu-config
won't be installable -- task-base finally rdepends on qemu-config, so we get
the do_rootfs failure:

The following packages have unmet dependencies:
|   task-base-extended: Depends: task-base but it is not going to be installed
| E: Broken packages

There is also a generic shutdown.desktop, we can keep it and use a proper
pkg_postinst to cope with the case of qemuarm.

(From OE-Core rev: 751212d5effdceab91d95705e647cf07e6820940)

Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-bsp/qemu-config/qemu-config.bb

@@ -5,7 +5,7 @@ LIC_FILES_CHKSUM = "file://${WORKDIR}/COPYING.GPL;md5=751419260aa954499f7abaabaa
 
 COMPATIBLE_MACHINE = "(qemuarm|qemux86|qemumips|qemuppc)"
 
-PR = "r21"
+PR = "r22"
 
 SRC_URI = "file://distcc.sh \
            file://anjuta-remote-run \
@@ -32,6 +32,11 @@ do_install() {
     install qemu-autostart ${D}/etc/init.d/
 }
 
+pkg_postinst_${PN} () {
+    grep -q qemuarm $D${sysconfdir}/hostname && \
+        sed -i $D${datadir}/applications/shutdown.desktop -e 's/^Exec=halt/Exec=reboot/'
+}
+
 RDEPENDS_${PN} = "distcc dbus-x11 task-core-nfs-server oprofileui-server rsync bash"
 
 inherit update-rc.d allarch

meta/recipes-bsp/qemu-config/qemu-config/qemuarm/shutdown.desktop

@@ -1,10 +0,0 @@
-[Desktop Entry]
-Encoding=UTF-8
-Type=Application
-Name=Shutdown
-Comment=Close down the machine safely
-Exec=reboot
-Icon=system-shutdown
-Terminal=false
-Categories=Utility;
-StartupNotify=true