instrumented executables

debug features in instrumented executables at runtime

them from scratch each time

blocks (via constant strings)

- If FRAMAC_SHARE is not already set, either frama-c -print-share-path
  gives a correct result, and there's no need to set FRAMAC_SHARE in the
  first place, or it does not, and putting this result in FRAMAC_SHARE
  won't do any good.
- there's no need (and it seems to confuse Frama-C) to -add-path when in
  internal mode.

[Makefile] Renamed e-acsl-runtime and e-acsl-reject test directories to runtime and reject respectively

[scripts] fix a small bug when running e-acsl-gcc.sh from an uninstalled version of Frama-C. It impacted the test suite in Frama-C internal mode