Change shader precision because of CTS Fail.

Change-Id: I5d8747ecf9091a251b56d3a9de4bdb8ab0260898
diff --git a/libs/hwui/ProgramCache.cpp b/libs/hwui/ProgramCache.cpp
index 1164ebf..2839ed7 100644
--- a/libs/hwui/ProgramCache.cpp
+++ b/libs/hwui/ProgramCache.cpp
@@ -56,7 +56,7 @@
         "uniform mat4 roundRectInvTransform;\n"
         "uniform mediump vec4 roundRectInnerRectLTWH;\n"
         "uniform mediump float roundRectRadius;\n";
-const char* gVS_Header_Varyings_HasTexture = "varying vec2 outTexCoords;\n";
+const char* gVS_Header_Varyings_HasTexture = "varying highp vec2 outTexCoords;\n";
 const char* gVS_Header_Varyings_HasColors = "varying vec4 outColors;\n";
 const char* gVS_Header_Varyings_HasVertexAlpha = "varying float alpha;\n";
 const char* gVS_Header_Varyings_HasBitmap = "varying highp vec2 outBitmapTexCoords;\n";