[gcc r10-9074] Add .clang-tidy to git ignored.

[Martin Liska]

https://gcc.gnu.org/g:b12ee4014a3d2cb10f56ce8d576fa3f7a594d733

commit r10-9074-gb12ee4014a3d2cb10f56ce8d576fa3f7a594d733
Author: Martin Liska <mliska@suse.cz>
Date:   Fri Jun 12 16:02:18 2020 +0200

    Add .clang-tidy to git ignored.
    
    Installed as obvious.
    
    ChangeLog:
    
            * .gitignore: Add .clang-tidy.

Diff:
---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index d9d3967a12c..d9eeaf2ed7a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,7 @@ TAGS.sub
 .lvimrc
 
 .clang-format
+.clang-tidy
 .clangd
 compile_commands.json