Ignore failing test testDesTest30_2_asm_only

Ignoring test during investigation to avoid confusion for those raising
unrelated PRs.

Author: jld01

build/org.eclipse.cdt.managedbuilder.core.tests/META-INF/MANIFEST.MF

@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.cdt.managedbuilder.core.tests; singleton:=true
-Bundle-Version: 8.2.400.qualifier
+Bundle-Version: 8.2.500.qualifier
 Bundle-Activator: org.eclipse.cdt.managedbuilder.testplugin.CTestPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin

build/org.eclipse.cdt.managedbuilder.core.tests/tests/org/eclipse/cdt/managedbuilder/core/tests/BuildDescriptionModelTests.java

@@ -249,7 +249,8 @@ public void testDes_Model() {
 		//		ManagedBuildTestHelper.removeProject(PREFIX + "1");
 	}
 
-	public void testDesTest30_2_asm_only() {
+	// Regression under investigation - issue #1290
+	public void ignoreDesTest30_2_asm_only() {
 		IProject project = createProject(PREFIX + "1", "test30_2.tar");
 		ManagedBuildTestHelper.createFile(project, "a.asm");
 		ManagedBuildTestHelper.createFile(project, "b.asm");