script/*: set executable bit on -learn and -imapd

It's useful to mark they're meant to be executable, even
if the shebang is useless.

diff --git a/script/public-inbox-imapd b/script/public-inbox-imapd
old mode 100644 (file)
new mode 100755 (executable)

diff --git a/script/public-inbox-learn b/script/public-inbox-learn
old mode 100644 (file)
new mode 100755 (executable)