[gcc(refs/vendors/redhat/heads/gcc-8-branch)] Backport: Add support for gcc as git submodule of another repository.

[Jakub Jelinek]

https://gcc.gnu.org/g:fd7973fda4439e4b64f19052aa741b02f5974eba

commit fd7973fda4439e4b64f19052aa741b02f5974eba
Author: Jim Wilson <jimw@sifive.com>
Date:   Wed May 2 00:24:45 2018 +0000

    Backport: Add support for gcc as git submodule of another repository.
    
            contrib/
            * gcc_update: Check for .git as a file.

Diff:
---
 contrib/ChangeLog  | 7 +++++++
 contrib/gcc_update | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/contrib/ChangeLog b/contrib/ChangeLog
index 039dc251ebb..47ac7c47dcc 100644
--- a/contrib/ChangeLog
+++ b/contrib/ChangeLog
@@ -1,3 +1,10 @@
+2020-01-15  Richard Earnshaw  <rearnsha@arm.com>
+
+	Backport:
+	2018-05-01  Jim Wilson  <jimw@sifive.com>
+
+	* gcc_update: Check for .git as a file.
+
 2019-08-16  Uros Bizjak  <ubizjak@gmail.com>
 
 	* test_summary: Do not escape "=".
diff --git a/contrib/gcc_update b/contrib/gcc_update
index a33bb543902..c9c71548f53 100755
--- a/contrib/gcc_update
+++ b/contrib/gcc_update
@@ -286,7 +286,7 @@ p
 esac
 
 # Check for known version control systems.
-if [ -d .git ]; then
+if [ -d .git ] || [ -f .git ]; then
     GCC_GIT=${GCC_GIT-${GIT-git}}
     vcs_type="git"
 elif [ -d .hg ]; then