Move CMake uninstall template file to CMake subdir

CMake/cmake_uninstall.cmake.in

@@ -1,9 +1,9 @@
 
-if (NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt")
-  message(FATAL_ERROR "Cannot find install manifest: \"@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt\"")
+if (NOT EXISTS "@GLFW_BINARY_DIR@/install_manifest.txt")
+    message(FATAL_ERROR "Cannot find install manifest: \"@GLFW_BINARY_DIR@/install_manifest.txt\"")
 endif()
 
-file(READ "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt" files)
+file(READ "@GLFW_BINARY_DIR@/install_manifest.txt" files)
 string(REGEX REPLACE "\n" ";" files "${files}")
 
 foreach (file ${files})

CMakeLists.txt

@@ -367,7 +367,7 @@ if (GLFW_INSTALL)
 
     # Only generate this target if no higher-level project already has
     if (NOT TARGET uninstall)
-        configure_file(cmake_uninstall.cmake.in
+        configure_file(CMake/cmake_uninstall.cmake.in
                        cmake_uninstall.cmake IMMEDIATE @ONLY)
 
         add_custom_target(uninstall