ntdll: Use the __NR_ names for Linux system calls.

dlls/ntdll/critsection.c

@@ -66,12 +66,12 @@ static int wake_op = 129; /*FUTEX_WAKE|FUTEX_PRIVATE_FLAG*/
 
 static inline int futex_wait( int *addr, int val, struct timespec *timeout )
 {
-    return syscall( SYS_futex, addr, wait_op, val, timeout, 0, 0 );
+    return syscall( __NR_futex, addr, wait_op, val, timeout, 0, 0 );
 }
 
 static inline int futex_wake( int *addr, int val )
 {
-    return syscall( SYS_futex, addr, wake_op, val, NULL, 0, 0 );
+    return syscall( __NR_futex, addr, wake_op, val, NULL, 0, 0 );
 }
 
 static inline int use_futexes(void)

dlls/ntdll/directory.c

@@ -109,7 +109,7 @@ typedef struct
 # define O_DIRECTORY 0200000 /* must be directory */
 #endif
 
-#ifdef SYS_getdents64
+#ifdef __NR_getdents64
 typedef struct
 {
     ULONG64        d_ino;
@@ -121,7 +121,7 @@ typedef struct
 
 static inline int getdents64( int fd, char *de, unsigned int size )
 {
-    return syscall( SYS_getdents64, fd, de, size );
+    return syscall( __NR_getdents64, fd, de, size );
 }
 #define USE_GETDENTS
 #endif

dlls/ntdll/server.c

@@ -962,7 +962,7 @@ static int get_unix_tid(void)
 #ifdef HAVE_PTHREAD_GETTHREADID_NP
     ret = pthread_getthreadid_np();
 #elif defined(linux)
-    ret = syscall( SYS_gettid );
+    ret = syscall( __NR_gettid );
 #elif defined(__sun)
     ret = pthread_self();
 #elif defined(__APPLE__)