layers:Rename cmd buffer flags for clarity

Fixes #870

CBSTATUS_ALL was not clear so changed to more descriptive
CBSTATUS_ALL_STATE_SET. This mask is used to flag all of the pipeline
state for a cmd buffer as "set." The setting can then be adjusted based
on which state was flagged as dynamic in the pipeline state object.
diff --git a/layers/core_validation.cpp b/layers/core_validation.cpp
index 0390dc3..e07929d 100644
--- a/layers/core_validation.cpp
+++ b/layers/core_validation.cpp
@@ -4205,12 +4205,12 @@
     // Account for any dynamic state not set via this PSO
     if (!pPipe->graphicsPipelineCI.pDynamicState ||
         !pPipe->graphicsPipelineCI.pDynamicState->dynamicStateCount) { // All state is static
-        pCB->status |= CBSTATUS_ALL;
+        pCB->status |= CBSTATUS_ALL_STATE_SET;
     } else {
         // First consider all state on
         // Then unset any state that's noted as dynamic in PSO
         // Finally OR that into CB statemask
-        CBStatusFlags psoDynStateMask = CBSTATUS_ALL;
+        CBStatusFlags psoDynStateMask = CBSTATUS_ALL_STATE_SET;
         for (uint32_t i = 0; i < pPipe->graphicsPipelineCI.pDynamicState->dynamicStateCount; i++) {
             switch (pPipe->graphicsPipelineCI.pDynamicState->pDynamicStates[i]) {
             case VK_DYNAMIC_STATE_LINE_WIDTH:
diff --git a/layers/core_validation_types.h b/layers/core_validation_types.h
index 6539d83..592d491 100644
--- a/layers/core_validation_types.h
+++ b/layers/core_validation_types.h
@@ -399,7 +399,7 @@
     CBSTATUS_STENCIL_WRITE_MASK_SET = 0x00000020,   // Stencil write mask has been set
     CBSTATUS_STENCIL_REFERENCE_SET  = 0x00000040,   // Stencil reference has been set
     CBSTATUS_INDEX_BUFFER_BOUND     = 0x00000080,   // Index buffer has been set
-    CBSTATUS_ALL                    = 0x0000007F,   // All dynamic state set (intentionally exclude index buffer)
+    CBSTATUS_ALL_STATE_SET          = 0x0000007F,   // All state set (intentionally exclude index buffer)
     // clang-format on
 };