mozcoreconf-v6.eclass: add still required Python 2.7 dependency

In commit 9d97336 and
af92983 Python 3 support was added
and PYTHON_COMPAT was moved from eclass to ebuild as requested by QA.

However, Python 2 dependency, which is still required, was lost.

This commit will bring back Python 2 dependency.

Note that we use python-any-r1_pkg_setup in moz_pkgsetup to initialize
Python 3 via PYTHON_COMPAT but we will switch back to Python 2 manually
using python_export later.

Closes: https://bugs.gentoo.org/679582
Signed-off-by: Thomas Deutschmann <[email protected]>

eclass/mozcoreconf-v6.eclass

@@ -21,6 +21,7 @@ inherit multilib toolchain-funcs flag-o-matic python-any-r1 versionator
 IUSE="${IUSE} custom-cflags custom-optimization"
 
 DEPEND="virtual/pkgconfig
+ dev-lang/python:2.7[ncurses,sqlite,ssl,threads(+)]
  ${PYTHON_DEPS}"
 
 # @FUNCTION: mozconfig_annotate