Dance around a driver issue that generates garbage pixels

We're getting reports of garbage pixels on the (PowerVR) Apple A10x. Restating the shader clipping logic in a different way appears to make these go away. This is probably a driver issue, since "coverage" should never be NaN and both versions ought be be equivalent.

Fixes #7423

Diffs=
b2894c99d Dance around a driver issue that generates garbage pixels (#8077)

Co-authored-by: Chris Dalton <99840794+csmartdalton@users.noreply.github.com>

.rive_head

@@ -1 +1 @@
-0dcbf4d1f22fa237f76def86c83ccfd8381458f1
+b2894c99d818c5155d90425e71327de847a833ae

renderer/src/shaders/draw_path.glsl

@@ -433,8 +433,7 @@ PLS_MAIN(@drawFragmentMain)
                 // check exact equality of the clipID.
                 half2 clipData = unpackHalf2x16(PLS_LOADUI(clipBuffer));
                 half clipContentID = clipData.g;
-                half clipCoverage = clipContentID == v_clipID ? clipData.r : make_half(.0);
-                coverage = min(coverage, clipCoverage);
+                coverage = (clipContentID == v_clipID) ? min(clipData.r, coverage) : make_half(.0);
             }
             PLS_PRESERVE_UI(clipBuffer);
         }

tests/deploy_tests.py

@@ -400,11 +400,11 @@ def launch_goldens(test_harness_server):
         print("Can't find rivspath " + args.src, flush=True)
         return -1;
 
-    src = glob.glob(os.path.join(args.src, "*.riv"))
-    n = len(src)
-
-    for riv in src:
-        rivsqueue.put(riv)
+    if os.path.isdir(args.src):
+        for riv in glob.iglob(os.path.join(args.src, "*.riv")):
+            rivsqueue.put(riv)
+    else:
+        rivsqueue.put(args.src)
 
     cmd = [tool,
            "--test_harness", "%s:%u" % test_harness_server.server_address,