Work around for nexus 6 TexSubImage issue

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/c69fe20ef35df0776b179cbd5ce4d1bdc0ba4090

Review URL: https://codereview.chromium.org/1173203005
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index dad2197..c7dc862 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -421,6 +421,10 @@
         fUseDrawInsteadOfClear = true;
     }
 
+    if (kAdreno4xx_GrGLRenderer == ctxInfo.renderer()) {
+        fUseDrawInsteadOfPartialRenderTargetWrite = true;
+    }
+
     if (kGL_GrGLStandard == standard) {
         // ARB allows mixed size FBO attachments, EXT does not.
         if (ctxInfo.version() >= GR_GL_VER(3, 0) ||