build_sdk_board: simplify .la file cleanup

Use find's -exec so we don't have to pipe through xargs.

BUG=chromium:793540
TEST=sdk bootstrap

Change-Id: I3fef000d174b6158e72a7680bc02ebf916121a5b
Reviewed-on: https://chromium-review.googlesource.com/c/1482530
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/build_sdk_board b/build_sdk_board
index a8a7ea1..8c4c226 100755
--- a/build_sdk_board
+++ b/build_sdk_board
@@ -155,8 +155,8 @@
 sudo cp -a "${CHROOT_VERSION_FILE}" "${BOARD_ROOT}${CHROOT_VERSION_FILE}"
 
 # Now cleanup paths referencing the ROOT from the *.la files.
-sudo find $BOARD_ROOT -type f -name '*.la' | xargs sudo \
-    sed -i -e "s|$BOARD_ROOT/|/|g"
+sudo find "${BOARD_ROOT}" -type f -name '*.la' -exec \
+  sed -i -e "s|${BOARD_ROOT}/|/|g" {} +
 
 command_completed
 echo "Done!"