devtool: point runqemu to correct native bindir

devtool/runqemu.py was relying on STAGING_BINDIR_NATIVE to find the host
tools it needed like qemu-system-<arch>.  In the post RSS world, this no
longer exists. This patch points it to
{STAGING_DIR}/{BUILD_ARCH}/{bindir_native}.

[YOCTO #11223]

(From OE-Core rev: 1910f9e9336bfedc8278a3bc02e7e7f934a4fc86)

Signed-off-by: brian avery <brian.avery@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/devtool/runqemu.py

@@ -32,7 +32,9 @@ def runqemu(args, config, basepath, workspace):
     tinfoil = setup_tinfoil(config_only=True, basepath=basepath)
     try:
         machine = tinfoil.config_data.getVar('MACHINE')
-        bindir_native = tinfoil.config_data.getVar('STAGING_BINDIR_NATIVE')
+        bindir_native = os.path.join(tinfoil.config_data.getVar('STAGING_DIR'),
+                                     tinfoil.config_data.getVar('BUILD_ARCH'),
+                                     tinfoil.config_data.getVar('bindir_native').lstrip(os.path.sep))
     finally:
         tinfoil.shutdown()