add flag for future removal of SkPaint::Align enum

Change-Id: I5ebd8f06b073088e3f31927cb2cc9f166ef0038d
Reviewed-on: https://chromium-review.googlesource.com/c/1308015
Commit-Queue: Mike Reed <reed@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604050}

skia/config/SkUserConfig.h

@@ -155,6 +155,10 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 #define SK_DISABLE_EXPLICIT_GPU_RESOURCE_ALLOCATION
 #endif
 
+#ifndef SK_SUPPORT_LEGACY_PAINTALIGNENUM
+#define SK_SUPPORT_LEGACY_PAINTALIGNENUM
+#endif
+
 // Max. verb count for paths rendered by the edge-AA tessellating path renderer.
 #define GR_AA_TESSELLATOR_MAX_VERB_COUNT 100