FPs now use the correct builder types(just a rename)

BUG=skia:

Review URL: https://codereview.chromium.org/648463003
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index 750e80a..154c003 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -195,7 +195,7 @@
                       const GrProcessor&) : INHERITED (factory) { }
     virtual ~GrGLSweepGradient() { }
 
-    virtual void emitCode(GrGLProgramBuilder*,
+    virtual void emitCode(GrGLFPBuilder*,
                           const GrFragmentProcessor&,
                           const GrProcessorKey&,
                           const char* outputColor,
@@ -266,7 +266,7 @@
 
 /////////////////////////////////////////////////////////////////////
 
-void GrGLSweepGradient::emitCode(GrGLProgramBuilder* builder,
+void GrGLSweepGradient::emitCode(GrGLFPBuilder* builder,
                                  const GrFragmentProcessor&,
                                  const GrProcessorKey& key,
                                  const char* outputColor,