sdk.py / OpkgSdk: remove_packaging_data() after install

Run remove_packaging_data() on both host and target sysroots to wipe
opkg state after install, similar to what RpmSdk does.

Use case:

Opkg may download local package indexes (I.e. file:// URLs) by
sym-linking them into /var/lib/opkg/lists/ instead of copying [1].
This leaves behind broken symlinks under the lists directory when
using opkg to build SDK sysroots.

The -h option may be set via SDKTAROPTS in some configurations to create
symlink-less SDK archives for Windows file systems. Sysroots containing
broken symlinks will fail to archive under this configuration.

Testing:

Verified /var/lib/opkg/ is empty after running populate_sdk() in a Fido
based distribution.

[1] http://git.yoctoproject.org/cgit/cgit.cgi/opkg/commit/?h=opkg-0.3.x&id=f9022a8520fcde8f1b71424d26a652c218fce685

(From OE-Core rev: c8e0ec2da9ad4ce1c103966906a85f68c15400dd)

Signed-off-by: Haris Okanovic <haris.okanovic@ni.com>
Reviewed-by: Alejandro del Castillo <alejandro.delcastillo@ni.com>
Natinst-ReviewBoard-ID: 119065
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/sdk.py

@@ -239,11 +239,15 @@ class OpkgSdk(Sdk):
 
         execute_pre_post_process(self.d, self.d.getVar("POPULATE_SDK_POST_TARGET_COMMAND", True))
 
+        self.target_pm.remove_packaging_data()
+
         bb.note("Installing NATIVESDK packages")
         self._populate_sysroot(self.host_pm, self.host_manifest)
 
         execute_pre_post_process(self.d, self.d.getVar("POPULATE_SDK_POST_HOST_COMMAND", True))
 
+        self.host_pm.remove_packaging_data()
+
         target_sysconfdir = os.path.join(self.sdk_target_sysroot, self.sysconfdir)
         host_sysconfdir = os.path.join(self.sdk_host_sysroot, self.sysconfdir)