[gcc r15-8091] gccrs: git: Ignore libgrust build folders

[Arthur Cohen via Gcc-cvs]

https://gcc.gnu.org/g:4e1314fecdf738a81411f47008cce6e461bfa711

commit r15-8091-g4e1314fecdf738a81411f47008cce6e461bfa711
Author: Arthur Cohen <arthur.co...@embecosm.com>
Date:   Mon Jan 29 16:17:00 2024 +0100

    gccrs: git: Ignore libgrust build folders
    
    ChangeLog:
    
            * .gitignore: Add libgrust target folders to the ignore list.

Diff:
---
 .gitignore | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.gitignore b/.gitignore
index f044fe16b5f6..7150fc3b29ca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -71,3 +71,6 @@ stamp-*
 /gmp*
 /isl*
 /gettext*
+
+# ADDITIONS from GCCRS front-end
+libgrust/*/target/