buildgcc: Fix typo in check for failed iasl build

Change-Id: I3e90b90e807ae775ac66af160a0f8547dcb3597a
Signed-off-by: Peter Stuge <peter@stuge.se>
Reviewed-on: http://review.coreboot.org/164
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index e58b23e..b3329b0 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -468,7 +468,7 @@
 	if [ ! -f .failed ]; then touch .success; fi
 ) &> $IASL_DIR/compiler/crossgcc-build.log
 test -r $IASL_DIR/compiler/.failed && printf "${RED}failed${NC}\n" || printf "${green}ok${NC}\n"
-test -r $IASL_DIR/compiler.failed && exit 1
+test -r $IASL_DIR/compiler/.failed && exit 1
 fi
 
 if [ $SAVETEMPS -eq 0 ]; then