Avoid wrong memory access due to double substitution and %%

src/gpu/gl/builders/GrGLProgramBuilder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLProgramBuilder.h"
 
 #include "gl/GrGLGeometryProcessor.h"
@@ skipping 440 matching lines @@
         GL_CALL(GetProgramiv(programID, GR_GL_INFO_LOG_LENGTH, &infoLen));
         SkAutoMalloc log(sizeof(char)*(infoLen+1));  // outside if for debugger
         if (infoLen > 0) {
             // retrieve length even though we don't need it to workaround
             // bug in chrome cmd buffer param validation.
             GrGLsizei length = GR_GL_INIT_ZERO;
             GL_CALL(GetProgramInfoLog(programID,
                                       infoLen+1,
                                       &length,
                                       (char*)log.get()));
-            SkDebugf((char*)log.get());
+            SkDebugf("%s", (char*)log.get());
         }
         SkDEBUGFAIL("Error linking program");
         GL_CALL(DeleteProgram(programID));
         programID = 0;
     }
     return SkToBool(linked);
 }
 
 void GrGLProgramBuilder::resolveUniformLocations(GrGLuint programID) {
     int count = fUniforms.count();
@@ skipping 20 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 GrGLInstalledFragProcs::~GrGLInstalledFragProcs() {
     int numProcs = fProcs.count();
     for (int e = 0; e < numProcs; ++e) {
         SkDELETE(fProcs[e]);
     }
 }