bitbake: compile tar-replacement firstly

Compiling tar-replacement or not is decided by version of host tar,
if the host tar version is lower than 1.23, Compiling tar-replacement
is needed.

When doing popoluate tar-replacement sysroot to write the tar to
sysroot, but writing is not finished. other packages probably
use the being written tar to unzip file, which will lead to failure
and report the below error:
"bitbake_build/tmp/sysroots/x86_64-linux/usr/bin/tar: Text file busy"

Now we compile tar-replacement firstly to ensure that a being written
tar command will not be used.

(From OE-Core rev: 3c1c4719fc96f6f1fbb257413d6baf3d91fdf4e8)

Signed-off-by: Roy.Li <rongqing.li@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/bitbake

@@ -152,7 +152,12 @@ if [ $buildpseudo -gt 0 ]; then
             fi
         done
     done
-    bitbake pseudo-native $TARTARGET $GITTARGET $additionalopts -c populate_sysroot
+
+    if [ $needtar = "1" ]; then
+	bitbake $TARTARGET -c populate_sysroot
+    fi
+
+    bitbake pseudo-native $GITTARGET $additionalopts -c populate_sysroot
     ret=$?
     if [ "$ret" != "0" ]; then
         exit 1