Build: Fix syntax error in Musca-B1 post_build

Fix syntax error in Musca-B1 post_build script that
was introduced by: ed5a22d.

Change-Id: I6b2c3fdeff85c6cc93678f8907098eb3c490e488
Signed-off-by: David Vincze <david.vincze@arm.com>
1 file changed