llvmpipe: add compute debug option

Reviewed-by: Roland Scheidegger <sroland@vmware.com>

src/gallium/drivers/llvmpipe/lp_debug.h

@@ -48,6 +48,7 @@ st_print_current(void);
 #define DEBUG_FENCE         0x2000
 #define DEBUG_MEM           0x4000
 #define DEBUG_FS            0x8000
+#define DEBUG_CS            0x10000
 
 /* Performance flags.  These are active even on release builds.
  */

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -69,6 +69,7 @@ static const struct debug_named_value lp_debug_flags[] = {
    { "fence", DEBUG_FENCE, NULL },
    { "mem", DEBUG_MEM, NULL },
    { "fs", DEBUG_FS, NULL },
+   { "cs", DEBUG_CS, NULL },
    DEBUG_NAMED_VALUE_END
 };
 #endif