Fix typo in auto/build regarding core builds.

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (2.525.32) UNRELEASED; urgency=medium
+
+  * Fix a terrible typo in auto/build that causes all core18 builds to fail on
+    this series (LP: #1849343).
+
+ -- Łukasz 'sil2100' Zemczak <lukasz.zemczak@ubuntu.com>  Tue, 22 Oct 2019 17:09:57 +0200
+
 livecd-rootfs (2.525.31) bionic; urgency=medium
 
   * magic-proxy: dump proxy log to stdout on failure (LP: #1847300)

live-build/auto/build

@@ -47,7 +47,7 @@ PREFIX="livecd.$PROJECT${SUBARCH:+-$SUBARCH}"
 if [ "${IMAGEFORMAT:-}" = "ubuntu-image" ]; then
 	# Use ubuntu-image instead of live-build
 
-	if [ "$PROJECT" = "ubuntu-core"]; then
+	if [ "$PROJECT" = "ubuntu-core" ]; then
 		CHANNEL="${CHANNEL:-edge}"
 		env SNAPPY_STORE_NO_CDN=1 \
 		ubuntu-image snap -c "$CHANNEL" $UBUNTU_IMAGE_ARGS \