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>
diff --git a/build_helper/build_helper_configs.py b/build_helper/build_helper_configs.py
index fc3c82c..cc6bf0e 100755
--- a/build_helper/build_helper_configs.py
+++ b/build_helper/build_helper_configs.py
@@ -99,8 +99,7 @@
                                      "-Binary -offset 0xA020000 "
                                      "-fill 0xFF 0xA020000 0xA200000 "
                                      "-o %(ci_build_root_dir)s/"
-                                     "spe/bin/tfm.hex -Intel;"
-                                     "fi;"),
+                                     "spe/bin/tfm.hex -Intel"),
                     "arm/rse/tc/tc3": ("if [ -f \"%(ci_build_root_dir)s/spe/bin/rse_bl1_tests.bin\" ]; then "
                                    "srec_cat "
                                    "%(ci_build_root_dir)s/spe/bin/bl1_1.bin -Binary -offset 0x0 "