Fix wrong use of emplace/emplace_back

after these patches:
https://cgit.freedesktop.org/libreoffice/core/commit/?id=ea6858c1e388c2d17a0825f3d21353ded67083eb
https://cgit.freedesktop.org/libreoffice/core/commit/?id=118a0a3734a3f794c67a9d7d4376d8ed78a96fee
https://cgit.freedesktop.org/libreoffice/core/commit/?id=c16804de78b1cf1ad906eaacbcc7c51d35218d8a

Change-Id: I287d64d3aef6cf18fbf20602680ae9ead0ab26e5
Reviewed-on: https://gerrit.libreoffice.org/43687Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

vcl/unx/generic/print/printerjob.cxx

@@ -576,8 +576,8 @@ PrinterJob::StartPage (const JobData& rJobSetup)
     osl::File* pPageHeader = CreateSpoolFile ( "psp_pghead", aExt);
     osl::File* pPageBody   = CreateSpoolFile ( "psp_pgbody", aExt);
 
-    maHeaderVector.emplace_back (pPageHeader);
-    maPageVector.emplace_back (pPageBody);
+    maHeaderVector.push_back (pPageHeader);
+    maPageVector.push_back (pPageBody);
 
     if( ! (pPageHeader && pPageBody) )
         return;

vcl/unx/generic/printer/ppdparser.cxx

@@ -584,7 +584,7 @@ const PPDParser* PPDParser::getParser( const OUString& rFile )
                     [pNewParser] (std::unique_ptr<PPDParser> const & x) { return x.get() == pNewParser; } ),
                 rPPDCache.aAllParsers.end());
         // insert new parser to vector
-        rPPDCache.aAllParsers.emplace_back( std::unique_ptr<PPDParser>(pNewParser) );
+        rPPDCache.aAllParsers.emplace_back(pNewParser);
     }
     return pNewParser;
 }

vcl/unx/generic/printer/printerinfomanager.cxx

@@ -463,7 +463,7 @@ void PrinterInfoManager::initialize()
                 if( find_it != m_aPrinters.end() )
                 {
                     aPrinter.m_aAlternateFiles = find_it->second.m_aAlternateFiles;
-                    aPrinter.m_aAlternateFiles.emplace( find_it->second.m_aFile );
+                    aPrinter.m_aAlternateFiles.insert( find_it->second.m_aFile );
                 }
                 m_aPrinters[ aPrinterName ] = aPrinter;
             }
@@ -629,7 +629,7 @@ bool PrinterInfoManager::writePrinterConfig()
                     // update alternate file list
                     // be sure m_aAlternateFiles doesn't contain the m_aFile value
                     it->second.m_aAlternateFiles.erase( files.begin()->first );
-                    it->second.m_aAlternateFiles.emplace( it->second.m_aFile );
+                    it->second.m_aAlternateFiles.insert( it->second.m_aFile );
                     // update file
                     it->second.m_aFile = files.begin()->first;
                 }