Remove 'Experimental' label from Core Build Makefile projects.

Removed the 'Experimental' label in project creation wizard for Core
Build Makefile projects. Seven years after the inception it's time to
remove it. Core Build Makefile is now in a usable state. The
'Experimental' label scares users away from it, making them fall back
to the old Managed Build Makefile projects.

build/org.eclipse.cdt.make.ui/plugin.xml

@@ -629,7 +629,7 @@
           label="Makefile Project"
           wizard="org.eclipse.cdt.make.internal.ui.wizards.NewMakefileProjectWizard">
        <description>
-          (Experimental) Create a new project that builds with the&apos;make&apos; build tool using CDT&apos;s new Core Build System.
+          Create a Makefile project using CDT&apos;s new Core Build System. Over existing content or a new project with optional Hello World example.
        </description>
        <tagReference
              id="org.eclipse.cdt.ui.cdtTag">

build/org.eclipse.cdt.make.ui/src/org/eclipse/cdt/make/internal/ui/wizards/NewMakefileProjectWizard.java

@@ -50,7 +50,7 @@ public void createControl(Composite parent) {
 
 				Button genSourceButton = new Button(buttonComp, SWT.CHECK);
 				genSourceButton.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
-				genSourceButton.setText("Generate Source and Makefile");
+				genSourceButton.setText("Create Hello World Source and Makefile example"); //$NON-NLS-1$
 				genSourceButton.setSelection(generateSource);
 				genSourceButton.addSelectionListener(new SelectionAdapter() {
 					@Override