[Piglit] [PATCH] appveyor: Fix build with CMake 3.13.3.

[Jose Fonseca]

Newer CMake versions (in particular 3.13.3 currently used by default
Appveyor machine) expects GLUT_glut_LIBRARY_RELEASE variable, instead of
GLUT_glut_LIBRARY.
---
 appveyor.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/appveyor.yml b/appveyor.yml
index 5f6faec85..1f8779187 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -78,7 +78,7 @@ install:
 - appveyor DownloadFile https://www.khronos.org/registry/OpenGL/api/GL/glext.h -FileName glext\GL\glext.h
 
 build_script:
-- cmake -H. -Bbuild -G "Ninja" -DGLUT_INCLUDE_DIR=%CD%\freeglut\include -DGLUT_glut_LIBRARY=%CD%\freeglut\%FREEGLUT_LIB% -DGLEXT_INCLUDE_DIR=%CD%\glext
+- cmake -H. -Bbuild -G "Ninja" -DGLUT_INCLUDE_DIR=%CD%\freeglut\include -DGLUT_glut_LIBRARY_RELEASE=%CD%\freeglut\%FREEGLUT_LIB% -DGLEXT_INCLUDE_DIR=%CD%\glext
 - ninja -C build
 
 
-- 
2.17.1