Eliminate "control reaches end of non-void function" warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32225 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Unix/Mutex.inc b/lib/System/Unix/Mutex.inc
index fa218db..d0984a4 100644
--- a/lib/System/Unix/Mutex.inc
+++ b/lib/System/Unix/Mutex.inc
@@ -31,16 +31,19 @@
 bool 
 Mutex::acquire()
 {
+  return true;
 }
 
 bool 
 Mutex::release()
 {
+  return true;
 }
 
 bool 
 Mutex::tryacquire( void )
 {
+  return true;
 }
 
 }