Fix bench to compile when SK_SUPPORTS_GPU is not provided as a compiler option

In the case that SK_SUPPORTS_GPU is not provided to the compiler, the value is
either defined in in the SkUserConfig.h or SkPostConfig.h. Prior to this change
HairlinePathBench would test that value before including anything, which led to
build errors.

BUG=skia:
R=djsollen@google.com, bsalomon@google.com

Author: cdalton@nvidia.com

Review URL: https://codereview.chromium.org/172103007

git-svn-id: http://skia.googlecode.com/svn/trunk@13502 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/HairlinePathBench.cpp b/bench/HairlinePathBench.cpp
index 16edcc7..11faff5 100644
--- a/bench/HairlinePathBench.cpp
+++ b/bench/HairlinePathBench.cpp
@@ -5,10 +5,6 @@
  * found in the LICENSE file.
  */
 
-#if SK_SUPPORT_GPU
-#include "GrTest.h"
-#include "GrDrawTargetCaps.h"
-#endif
 #include "SkBenchmark.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
@@ -16,6 +12,11 @@
 #include "SkShader.h"
 #include "SkString.h"
 
+#if SK_SUPPORT_GPU
+#include "GrTest.h"
+#include "GrDrawTargetCaps.h"
+#endif
+
 enum Flags {
     kBig_Flag = 1 << 0,
     kAA_Flag = 1 << 1