Cleanup of shader building system

this is a huge refactor and cleanup of the gl shader building system in
Skia.  The entire shader building pipeline is now part of
GrGLProgramCreator, which takes a gp, and some fps, and creates a
program.  I added some subclasses of GrGLProgram to handle the
eccentricities of Nvpr/Nvpres.  Outside of the builders folder
and GrGLPrograms, this change is basically just a rename

solo gp

BUG=skia:

Review URL: https://codereview.chromium.org/611653002
diff --git a/src/gpu/GrDrawState.cpp b/src/gpu/GrDrawState.cpp
index f967a6f..6831fad 100644
--- a/src/gpu/GrDrawState.cpp
+++ b/src/gpu/GrDrawState.cpp
@@ -266,7 +266,7 @@
 
     if (this->hasGeometryProcessor()) {
         const GrGeometryStage& stage = *this->getGeometryProcessor();
-        const GrGeometryProcessor* gp = stage.getGeometryProcessor();
+        const GrGeometryProcessor* gp = stage.getProcessor();
         SkASSERT(gp);
         // make sure that any attribute indices have the correct binding type, that the attrib
         // type and effect's shader lang type are compatible, and that attributes shared by
@@ -410,7 +410,7 @@
 
     // Run through the coverage stages and see if the coverage will be all ones at the end.
     if (this->hasGeometryProcessor()) {
-        const GrGeometryProcessor* gp = fGeometryProcessor->getGeometryProcessor();
+        const GrGeometryProcessor* gp = fGeometryProcessor->getProcessor();
         gp->computeInvariantOutput(&inout);
     }
     for (int s = 0; s < this->numCoverageStages(); ++s) {
@@ -436,13 +436,13 @@
 bool GrDrawState::willEffectReadDstColor() const {
     if (!this->isColorWriteDisabled()) {
         for (int s = 0; s < this->numColorStages(); ++s) {
-            if (this->getColorStage(s).getFragmentProcessor()->willReadDstColor()) {
+            if (this->getColorStage(s).getProcessor()->willReadDstColor()) {
                 return true;
             }
         }
     }
     for (int s = 0; s < this->numCoverageStages(); ++s) {
-        if (this->getCoverageStage(s).getFragmentProcessor()->willReadDstColor()) {
+        if (this->getCoverageStage(s).getProcessor()->willReadDstColor()) {
             return true;
         }
     }