Replace calls from make_unique to lyx::make_unique

After advice from Yuriy Skalko to satisfy compilation with clang8

src/Buffer.cpp

@@ -1471,7 +1471,7 @@ bool Buffer::save() const
 	// proper location once that has been done successfully. that
 	// way we preserve the original file if something goes wrong.
 	string const justname = fileName().onlyFileNameWithoutExt();
-	auto tempfile = make_unique<TempFile>(fileName().onlyPath(),
+	auto tempfile = lyx::make_unique<TempFile>(fileName().onlyPath(),
 	                                      justname + "-XXXXXX.lyx");
 	bool const symlink = fileName().isSymLink();
 	if (!symlink)

src/BufferList.cpp

@@ -128,7 +128,7 @@ Buffer * BufferList::createNewBuffer(string const & s)
 {
 	unique_ptr<Buffer> tmpbuf;
 	try {
-		tmpbuf = make_unique<Buffer>(s);
+		tmpbuf = lyx::make_unique<Buffer>(s);
 	} catch (ExceptionMessage const & message) {
 		if (message.type_ == ErrorException) {
 			Alert::error(message.title_, message.details_);

src/TocBackend.cpp

@@ -143,7 +143,7 @@ shared_ptr<Toc> TocBackend::toc(string const & type)
 
 TocBuilder & TocBackend::builder(string const & type)
 {
-	auto p = make_unique<TocBuilder>(toc(type));
+	auto p = lyx::make_unique<TocBuilder>(toc(type));
 	return * builders_.insert(make_pair(type, move(p))).first->second;
 }
 

src/graphics/GraphicsCacheItem.cpp

@@ -442,7 +442,7 @@ void CacheItem::Impl::convertToDisplayFormat()
 	// Connect a signal to this->imageConverted and pass this signal to
 	// the graphics converter so that we can load the modified file
 	// on completion of the conversion process.
-	converter_ = make_unique<Converter>(doc_file_, filename,
+	converter_ = lyx::make_unique<Converter>(doc_file_, filename,
 	                                    to_file_base.absFileName(),
 	                                    from, to_);
 	// Connection is closed at the same time as *this is destroyed.

src/mathed/MathExtern.cpp

@@ -599,7 +599,7 @@ void extractFunctions(MathData & ar, ExternalMath kind)
 		extractScript(exp, jt, ar.end(), true);
 
 		// create a proper inset as replacement
-		auto p = make_unique<InsetMathExFunc>(buf, name);
+		auto p = lyx::make_unique<InsetMathExFunc>(buf, name);
 
 		// jt points to the "argument". Get hold of this.
 		MathData::iterator st =
@@ -684,7 +684,7 @@ void extractIntegrals(MathData & ar, ExternalMath kind)
 			continue;
 
 		// core is part from behind the scripts to the 'd'
-		auto p = make_unique<InsetMathExInt>(buf, from_ascii("int"));
+		auto p = lyx::make_unique<InsetMathExInt>(buf, from_ascii("int"));
 
 		// handle scripts if available
 		if (!testIntSymbol(*it)) {
@@ -769,7 +769,7 @@ void extractSums(MathData & ar)
 			continue;
 
 		// create a proper inset as replacement
-		auto p = make_unique<InsetMathExInt>(buf, from_ascii("sum"));
+		auto p = lyx::make_unique<InsetMathExInt>(buf, from_ascii("sum"));
 
 		// collect lower bound and summation index
 		InsetMathScript const * sub = ar[i]->asScriptInset();
@@ -857,7 +857,7 @@ void extractDiff(MathData & ar)
 		}
 
 		// create a proper diff inset
-		auto diff = make_unique<InsetMathDiff>(buf);
+		auto diff = lyx::make_unique<InsetMathDiff>(buf);
 
 		// collect function, let jt point behind last used item
 		MathData::iterator jt = it + 1;

src/support/FileMonitor.cpp

@@ -59,7 +59,7 @@ FileSystemWatcher::getGuard(FileName const & filename)
 //static
 FileMonitorPtr FileSystemWatcher::monitor(FileName const & filename)
 {
-	return make_unique<FileMonitor>(instance().getGuard(filename));
+	return lyx::make_unique<FileMonitor>(instance().getGuard(filename));
 }
 
 
@@ -67,7 +67,7 @@ FileMonitorPtr FileSystemWatcher::monitor(FileName const & filename)
 ActiveFileMonitorPtr FileSystemWatcher::activeMonitor(FileName const & filename,
                                                       int interval)
 {
-	return make_unique<ActiveFileMonitor>(instance().getGuard(filename),
+	return lyx::make_unique<ActiveFileMonitor>(instance().getGuard(filename),
 	                                      filename, interval);
 }