[libclc] Fix typo in __clc_atomic_dec/inc functions

Author: wenju-he

libclc/clc/lib/generic/atomic/clc_atomic_dec.cl

@@ -9,7 +9,7 @@
 #include <clc/atomic/clc_atomic_dec.h>
 
 #define __CLC_FUNCTION __clc_atomic_dec
-#define __CLC_IMPL_FUNCTION __scoped_atomic_fetch_add
+#define __CLC_IMPL_FUNCTION __scoped_atomic_fetch_sub
 #define __CLC_INC_DEC
 
 #define __CLC_BODY <clc_atomic_def.inc>

libclc/clc/lib/generic/atomic/clc_atomic_inc.cl

@@ -9,7 +9,7 @@
 #include <clc/atomic/clc_atomic_inc.h>
 
 #define __CLC_FUNCTION __clc_atomic_inc
-#define __CLC_IMPL_FUNCTION __scoped_atomic_fetch_sub
+#define __CLC_IMPL_FUNCTION __scoped_atomic_fetch_add
 #define __CLC_INC_DEC
 
 #define __CLC_BODY <clc_atomic_def.inc>