The ICU libraries are now located under
/usr/lib/x86_64-linux-gnu
/usr/lib/i386-linux-gnu
They were previously located under
/usr/lib64
/usr/lib32
The configure script runs a detection sequence that works for all
supported platforms.
Remove GTMHELP.o when deleting all built files
Do not leak LD_LIBRARY_PATH changes to rest of script. They
break fakeroot and prevent subsequent commands like "chmod"
from working during debian package genaration.