Add GlopBuilder test for snapping

Change-Id: I7aa5cddef6f0a0e78f3ade67b0446c1f76cf3d13
diff --git a/libs/hwui/Android.mk b/libs/hwui/Android.mk
index cc38af2..3f8fbca 100644
--- a/libs/hwui/Android.mk
+++ b/libs/hwui/Android.mk
@@ -240,6 +240,7 @@
     tests/unit/DamageAccumulatorTests.cpp \
     tests/unit/DeviceInfoTests.cpp \
     tests/unit/FatVectorTests.cpp \
+    tests/unit/GlopBuilderTests.cpp \
     tests/unit/GpuMemoryTrackerTests.cpp \
     tests/unit/LayerUpdateQueueTests.cpp \
     tests/unit/LinearAllocatorTests.cpp \