Fix "mv: 'libecl.so' and 'libecl.so.24.5.10' are the same file" error during build
I got the error
mv: 'libecl.so' and 'libecl.so.24.5.10' are the same file
during build. Probably since I played around a bit with the build system and the symlink was already in place from a previous run. To fix this, the makefile now checks for the existence of the symlink as well before trying to recreate it.