[PATCH] common/rc: replace obsolescent egrep and fgrep

[Zorro Lang <zlang@kernel.org>]

Due to the change in grep project:
  a95156247098 ("egrep, fgrep: now obsolete")

some tests start to fail on latest Fedora system with grep-3.8-1.fc38
or newer version, as:

  generic/447 70s ... egrep: warning: egrep is obsolescent; using grep -E
  ...
      @@ -1,4 +1,5 @@
       QA output created by 447
      +egrep: warning: egrep is obsolescent; using grep -E
      ...

So use grep -E and -F to instead of egrep and fgrep commands.

Signed-off-by: Zorro Lang <zlang@kernel.org>
---
 common/rc | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/common/rc b/common/rc
index a25cbcd0..dee3965e 100644
--- a/common/rc
+++ b/common/rc
@@ -30,6 +30,17 @@ dd()
 	fi
 }
 
+# The egrep and fgrep are obsolescent
+egrep()
+{
+	grep -E "$@"
+}
+
+fgrep()
+{
+	grep -F "$@"
+}
+
 # Prints the md5 checksum of a given file
 _md5_checksum()
 {
-- 
2.31.1