[PATCH] BaseTools/edksetup.sh: Handle the return value from grep

[Gary Lin <glin@suse.com>]

When SetupPython3() parses the possible python binary paths, it uses
`grep "[[:digit:]]$"` to filter the python versions in the file name.
Since grep would return 1 when the last character of the file name is
not a digit, OvmfPkg/build.sh would fail immediately when the function
is handling some cases, e.g. "python3:".

This commit adds `|| true` to the grep command to make sure the command
never returns 1 in any condition.

[NOTE: For the python3 branch]

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Gary Lin <glin@suse.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
---
 edksetup.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/edksetup.sh b/edksetup.sh
index 5ff3be19fb2f..d4e577e60781 100755
--- a/edksetup.sh
+++ b/edksetup.sh
@@ -115,7 +115,7 @@ function SetupPython3()
 {
   for python in $(whereis python3)
   do
-    python=$(echo $python | grep "[[:digit:]]$")
+    python=$(echo $python | grep "[[:digit:]]$" || true)
     python_version=${python##*python}
     if [ -z "${python_version}" ];then
       continue
-- 
2.18.0