Rework configure invocation:

Rework configure invocation:
+ --with-runpath=/usr/lib/ncbi-blast+ (where the libraries will end up)
+ --with-flat-makefile (making it easier to skip irrelevant projects)
+ --without-lzo (to avoid picking up an extra dependency in some environments)
+ --without-autodep and --without-makefile-auto-update for streamlining.
+ --with-build-root=BUILD for predictable paths
* --without-debug -> --with-optimization when DEB_BUILD_OPTIONS contains
  nostrip.  Doing so unconditionally would be cleaner, as that change also
  switches from -DNDEBUG to -D_DEBUG, but that detail isn't worth demanding
  extra build-time resources by default.
- --without-gbench, --without-internal, and --with-3psw=std:netopt (superfluous)
- --bindir=*, --libdir=*, --prefix=* (files now installed directly)
Supply LD_LIBRARY_PATH so that project_tree_builder can find the libraries it
needs and --with-flat-makefile is effective.