Really work around iOS varying limit in GLPrograms test

Bug: skia:6627
Change-Id: I80142f5288e1c6f59f6add3a5a71ab90da90d3cc
Reviewed-on: https://skia-review.googlesource.com/18069
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/tests/GLProgramsTest.cpp b/tests/GLProgramsTest.cpp
index db65c9b..26df90e 100644
--- a/tests/GLProgramsTest.cpp
+++ b/tests/GLProgramsTest.cpp
@@ -352,7 +352,7 @@
         }
 #endif
     // On iOS we can exceed the maximum number of varyings. http://skbug.com/6627.
-#ifdef SK_BUILDF_FOR_IOS
+#ifdef SK_BUILD_FOR_IOS
         maxStages = 3;
 #endif
     }