extract_utils: export SIGSCAN

For use in device scripts

Change-Id: I7a8c9abd0b585a67963e65d5ad042da79d4d3c77
diff --git a/extract_utils.sh b/extract_utils.sh
index 34eb8c3..deebe29 100644
--- a/extract_utils.sh
+++ b/extract_utils.sh
@@ -98,6 +98,7 @@
 
     export SIMG2IMG="$BINARIES_LOCATION"/simg2img
     export LPUNPACK="$BINARIES_LOCATION"/lpunpack
+    export SIGSCAN="$BINARIES_LOCATION"/SigScan
 
     for version in 0_8 0_9; do
         export PATCHELF_${version}="$BINARIES_LOCATION"/patchelf-"${version}"