Add CMakeL10n rules.

Update translation template.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit ee58320d73)

CMakeL10n.txt

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+#################################################
+#
+#  (C) 2019 Slávek Banko
+#  slavek.banko (AT) axis.cz
+#
+#  Improvements and feedback are welcome
+#
+#  This file is released under GPL >= 2
+#
+#################################################
+
+cmake_minimum_required( VERSION 2.8 )
+
+
+##### include our cmake modules #################
+
+set( CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules" )
+include( TDEL10n )
+
+
+##### create translation templates ##############
+
+tde_l10n_auto_add_subdirectories( )

kshowmail/CMakeL10n.txt

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+##### create translation templates ##############
+
+tde_l10n_create_template( "kshowmail" )