Fix build for old gcc

Workaround extra temporaries created by gcc-4.0 on mac - since here
PoHeader has private copy ctor.

Change-Id: I6faf99f78c11452f6adf6f1f18e1ceda9e23e7a2

l10ntools/source/localize.cxx

@@ -272,7 +272,8 @@ void handleCommand(
                             inPath.lastIndexOf('/')- nProjectInd),
                         RTL_TEXTENCODING_UTF8 );
 
-                rPoOutPut.writeHeader(PoHeader(relativPath));
+                PoHeader aTmp(relativPath);
+                rPoOutPut.writeHeader(aTmp);
             }
         }
         while (!in.eof())

l10ntools/source/renewpo.cxx

@@ -164,7 +164,9 @@ void HandleLanguage(const OString& LangEntryName, const OString& rOldPath,
                     << sOldPoFileName.getStr() << endl;
                 return;
             }
-            aNewPo.writeHeader(PoHeader(aOldPo));
+
+            PoHeader aTmp(aOldPo);
+            aNewPo.writeHeader(aTmp);
             aOldPo.close();
         }