deskutils/recoll: Update to 1.23.7

Changelog:
http://www.lesbonscomptes.com/recoll/release-1.23.html

Additional port changes:

• Changed to DISTVERSION
• Removed CONFIGURE_ARGS=--enable-pic (not needed)
• Added @${PY_FLAVOR} where it was missing
• Fixed space chars in target

PR: 224830
Submitted by: jjuanino@gmail.com
Approved by: tcberner (mentor, implicit)