Fix update to build for alt arch machine.

Commit 9ca6e39c7ee26570e29dc87332ffb0f6c1d0e4a4 changed the UseLemon to use
the target lemon built by the target wireshark. Revert to use the one built by 
wireshark-native.

Upstream-Status: Inappropriate [configuration]
Signed-off: Armin Kuster <akuster@mvista.com>

Index: wireshark-3.2.18/cmake/modules/UseLemon.cmake
===================================================================
--- wireshark-3.2.18.orig/cmake/modules/UseLemon.cmake
+++ wireshark-3.2.18/cmake/modules/UseLemon.cmake
@@ -13,7 +13,7 @@ MACRO(ADD_LEMON_FILES _source _generated
           # These files are generated as side-effect
           ${_out}.h
           ${_out}.out
-         COMMAND $<TARGET_FILE:lemon>
+         COMMAND lemon
            -T${_lemonpardir}/lempar.c
            -d.
            ${_in}