git: Add CMakeLists.txt.user Qt Creator configuration to ignore list
diff --git a/.gitignore b/.gitignore
index 4281522..6429423 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@
 /test/gflags_unittest_main.cc
 /test/gflags_unittest-main.cc
 /packages/
+CMakeLists.txt.user