solenv/flatpak-manifest.in: Properly disable debug information

...see 02248e9e "solenv/flatpak-manifest.in:
Disable debug information again, for now" commit message

Change-Id: I4a9f8c547a50e8a8c83b5f96768949867aa4bb7b
Reviewed-on: https://gerrit.libreoffice.org/55453Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

distro-configs/LibreOfficeFlatpak.conf

 --disable-gtk
 --disable-odk
 --enable-release-build
---enable-symbols
 --with-ant-home=/run/build/libreoffice/ant
 --with-extra-buildid=Flatpak version
 --with-jdk-home=/usr/lib/sdk/openjdk10/jvm/openjdk-10

solenv/flatpak-manifest.in

@@ -599,7 +599,7 @@
             ],
             "buildsystem": "simple",
             "build-commands": [
-                "./autogen.sh --prefix=/run/build/libreoffice/inst --with-distro=LibreOfficeFlatpak --disable-symbols",
+                "./autogen.sh --prefix=/run/build/libreoffice/inst --with-distro=LibreOfficeFlatpak",
                 "make $(if test \"$(uname -i)\" = i386; then printf build-nocheck; fi)",
                 "make distro-pack-install",
                 "make cmd cmd='$(SRCDIR)/solenv/bin/assemble-flatpak.sh'",