Fix heredoc for libtalerutil pkgconfig stub

Dockerfile

@@ -118,18 +118,18 @@ RUN set -e; \
     # Provide a temporary pkg-config stub for libtalerutil so configure can proceed when building from source tarballs \
     if [ ! -f /usr/lib/pkgconfig/libtalerutil.pc ]; then \
       mkdir -p /usr/lib/pkgconfig; \
-      cat > /usr/lib/pkgconfig/libtalerutil.pc <<'EOF' \
-prefix=/usr \
-exec_prefix=${prefix} \
-libdir=${exec_prefix}/lib \
-includedir=${prefix}/include \
-Name: libtalerutil \
-Description: Temporary stub for libtalerutil (will be replaced by build) \
-Version: 1.2.1 \
-Libs: -L${libdir} -ltalerutil -lgnunetutil \
-Cflags: -I${includedir} \
-EOF \
-; fi; \
+      cat > /usr/lib/pkgconfig/libtalerutil.pc <<'EOF'
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+Name: libtalerutil
+Description: Temporary stub for libtalerutil (will be replaced by build)
+Version: 1.2.1
+Libs: -L${libdir} -ltalerutil -lgnunetutil
+Cflags: -I${includedir}
+EOF
+    fi; \
     cd "${EXCHANGE_DIR}" && env GNUNET_PREFIX=/usr GIT_CONFIG_NOSYSTEM=1 GIT_DIR= GIT_WORK_TREE=. ./configure --prefix=/usr && make -j$(nproc) && make install; \
     ldconfig; \
     # Merchant