Misc fixes
- prevent use of Git build from LCG
- better handling of
LD_LIBRARY_PATH
for libraries not coming from the LCG toolchain (needed for picking up, e.g., local DD4hep in upgrade-hackathon-setup)
LD_LIBRARY_PATH
for libraries not coming from the LCG toolchain (needed for picking up, e.g., local DD4hep in upgrade-hackathon-setup)