[PATCH] BaseTools/BuildEnv: override "set -C" (noclobber) in sourcing shell env

[Laszlo Ersek <lersek@redhat.com>]

The BuildEnv utility is sourced (executed by the user's interactive shell)
when the user sets up the build session. Some users like to set -C
(noclobber) for some additional safety in their shells, which trips up
BuildEnv. Update the redirection operator so that it overrides noclobber.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---

Notes:
    Repo:   https://github.com/lersek/edk2.git
    Branch: buildenv_clobber

 BaseTools/BuildEnv | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BaseTools/BuildEnv b/BaseTools/BuildEnv
index f74881111c8e..ff0c5115a5e1 100755
--- a/BaseTools/BuildEnv
+++ b/BaseTools/BuildEnv
@@ -90,7 +90,7 @@ StoreCurrentConfiguration() {
   #
   OUTPUT_FILE=$CONF_PATH/BuildEnv.sh
   #echo Storing current configuration into $OUTPUT_FILE
-  echo "# Auto-generated by ${BASH_SOURCE[0]}" > $OUTPUT_FILE
+  echo "# Auto-generated by ${BASH_SOURCE[0]}" >| $OUTPUT_FILE
   GenerateShellCodeToSetVariable WORKSPACE $OUTPUT_FILE
   GenerateShellCodeToSetVariable EDK_TOOLS_PATH $OUTPUT_FILE
   GenerateShellCodeToUpdatePath $OUTPUT_FILE
-- 
2.14.1.3.gb7cf6e02401b