Update LD_LIBRARY_PATH in tests to reflect build dir changes
Update LD_LIBRARY_PATH in tests to reflect build dir changes

RevBy: Krzesimir Nowak
Much simpler now, and less likely that some directory is
missed and that we acidentially test system libraries instead
of in-tree libraries.

Full, original commit at 947fee0348f6615ef88385bbd01605d9b73c485b in maliit-framework

maliit/inputcontext-gtk,maliit/inputcontext-gtk