Fixing tru-> true (#135)

eclipse-jdt/eclipse.jdt.core#409

Author: SarikaSinha

org.eclipse.jdt.launching/META-INF/MANIFEST.MF

@@ -1,7 +1,7 @@
 Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
-Bundle-SymbolicName: org.eclipse.jdt.launching; singleton:=tru
+Bundle-SymbolicName: org.eclipse.jdt.launching; singleton:=true
 Bundle-Version: 3.19.800.qualifier
 Bundle-Activator: org.eclipse.jdt.internal.launching.LaunchingPlugin
 Bundle-Vendor: %providerName