Fix dethread build for OS X and iOS

Change-Id: I6fb2f2af89d7568bd473597a0d413c3987e457ae
diff --git a/framework/delibs/dethread/unix/deMutexUnix.c b/framework/delibs/dethread/unix/deMutexUnix.c
index 59ae945..42ba42a 100644
--- a/framework/delibs/dethread/unix/deMutexUnix.c
+++ b/framework/delibs/dethread/unix/deMutexUnix.c
@@ -23,7 +23,7 @@
 
 #include "deMutex.h"
 
-#if (DE_OS == DE_OS_UNIX || DE_OS == DE_OS_ANDROID || DE_OS == DE_OS_SYMBIAN || DE_OS == DE_OS_QNX)
+#if (DE_OS == DE_OS_UNIX || DE_OS == DE_OS_ANDROID || DE_OS == DE_OS_SYMBIAN || DE_OS == DE_OS_QNX || DE_OS == DE_OS_OSX || DE_OS == DE_OS_IOS)
 
 #include "deMemory.h"