Bug 1349002 - Build DMD with unified sources. r=njn

DMD can be built with unified sources, additionally it doesn't need NSPR's
strcpy to build properly.

MozReview-Commit-ID: 9hZFlpWdt7

memory/replace/dmd/DMD.cpp

@@ -20,6 +20,8 @@
 #include <windows.h>
 #include <process.h>
 #else
+#include <pthread.h>
+#include <sys/types.h>
 #include <unistd.h>
 #endif
 
@@ -440,9 +442,6 @@ public:
 
 #else
 
-#include <pthread.h>
-#include <sys/types.h>
-
 class MutexBase
 {
   pthread_mutex_t mMutex;
@@ -527,8 +526,6 @@ public:
 
 #else
 
-#include <pthread.h>
-
 #define DMD_TLS_INDEX_TYPE               pthread_key_t
 #define DMD_CREATE_TLS_INDEX(i_)         pthread_key_create(&(i_), nullptr)
 #define DMD_DESTROY_TLS_INDEX(i_)        pthread_key_delete((i_))

memory/replace/dmd/moz.build

@@ -8,7 +8,7 @@ EXPORTS += [
     'DMD.h',
 ]
 
-SOURCES += [
+UNIFIED_SOURCES += [
     '../../../mfbt/HashFunctions.cpp',
     '../../../mfbt/JSONWriter.cpp',
     '../../../mfbt/Poison.cpp',
@@ -16,10 +16,6 @@ SOURCES += [
     'DMD.cpp',
 ]
 
-SOURCES += [
-    '../../../nsprpub/lib/libc/src/strcpy.c',
-]
-
 SharedLibrary('dmd')
 
 DEFINES['MOZ_NO_MOZALLOC'] = True