xcompile: Quote variables to prevent globbing and splitting.

Quoting variables prevents word splitting and glob expansion, and
prevents the script from breaking when input contains spaces, line
feeds, glob characters and such.

See shellcheck warning SC2086

Change-Id: Ib6ca46b64a621c4bea5c33ac312f2824b0386235
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/12845
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed