Print error from driver when shader compiler fails

src/gpu/gl/builders/GrGLShaderStringBuilder.cpp

Index: src/gpu/gl/builders/GrGLShaderStringBuilder.cpp
diff --git a/src/gpu/gl/builders/GrGLShaderStringBuilder.cpp b/src/gpu/gl/builders/GrGLShaderStringBuilder.cpp
index 296c2beb44fa35ee7cc08d2076fa9b766bfa9b11..d2e49a5cfb0b5716b988aa4d3aaec1d4a5451050 100644
--- a/src/gpu/gl/builders/GrGLShaderStringBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLShaderStringBuilder.cpp
@@ -73,6 +73,7 @@ GrGLuint GrGLCompileAndAttachShader(const GrGLContext& glCtx,
                 GrGLsizei length = GR_GL_INIT_ZERO;
                 GR_GL_CALL(gli, GetShaderInfoLog(shaderId, infoLen+1, &length, (char*)log.get()));
                 print_shader_source(strings, lengths, count);
+                SkDebugf("\n%s", (const char*)log.get());
             }
             SkDEBUGFAIL("Shader compilation failed!");
             GR_GL_CALL(gli, DeleteShader(shaderId));