tdf#156717 Fix "LibreOffice Community" in PDF metadata

These settings are available to set the brand when building LibreOffice:

1) Community flavor: yes / no
This is set via --disable-community-flavor, that defines
HAVE_FEATURE_COMMUNITY_FLAVOR, which is used in cui/source/dialogs/about.cxx.

2) Product name: A string (set via --with-product-name='name')
This defines PRODUCTNAME, which is used in many places in the code.

Not every LibreOffice build is a "LibreOffice Community" flavor. This
patch fixes this issue by using community brand only when variable
HAVE_FEATURE_COMMUNITY_FLAVOR is set.

Change-Id: Ib74450f380fed7c24222f88e389ddb5363bda3c1
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168676
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Tested-by: Jenkins

filter/source/pdf/pdfexport.cxx

@@ -515,7 +515,11 @@ bool PDFExport::Export( const OUString& rFile, const Sequence< PropertyValue >&
                         utl::ConfigManager::getProductName() +
                         " " +
                         utl::ConfigManager::getAboutBoxProductVersion() +
-                        " (" + arch + ") / LibreOffice Community";
+                        " (" + arch + ")"
+#if HAVE_FEATURE_COMMUNITY_FLAVOR
+                        " / LibreOffice Community"
+#endif
+                        ;
             }
 
             aContext.DocumentInfo.Creator = aCreator;