squisher: replace $ANDROID_BUILD_TOP

Now uses $OUT/../../../host instead of $ANDROID_BUILD_TOP/out/host
fixes build when used with OUT_DIR_COMMON_BASE

Change-Id: Ib1934b57f3e94a3c3af10189c803fc494438a4a4
diff --git a/tools/squisher b/tools/squisher
index 552929f..9a4b0bd 100755
--- a/tools/squisher
+++ b/tools/squisher
@@ -88,7 +88,7 @@
 printf "Signing package..."
 SECURITYDIR=$ANDROID_BUILD_TOP/build/target/product/security
 java -Xmx1024m \
-	-jar $ANDROID_BUILD_TOP/out/host/$OUT_TARGET_HOST/framework/signapk.jar \
+	-jar $OUT/../../../host/$OUT_TARGET_HOST/framework/signapk.jar \
 	-w $SECURITYDIR/testkey.x509.pem $SECURITYDIR/testkey.pk8 \
 	$REPACK/update.zip $OUTFILE
 echo