fixing the header ('licenses' is not 'license')

src/plugins/e-acsl/E_ACSL.mli

src/plugins/e-acsl/Makefile.in

src/plugins/e-acsl/configure.ac

src/plugins/e-acsl/env.ml

src/plugins/e-acsl/env.mli

src/plugins/e-acsl/error.ml

src/plugins/e-acsl/error.mli

src/plugins/e-acsl/license/CEA_LGPL

src/plugins/e-acsl/local_config.mli

src/plugins/e-acsl/loops.ml

src/plugins/e-acsl/loops.mli

src/plugins/e-acsl/main.ml

src/plugins/e-acsl/misc.ml

src/plugins/e-acsl/misc.mli

src/plugins/e-acsl/mpz.ml

src/plugins/e-acsl/mpz.mli

src/plugins/e-acsl/options.ml

src/plugins/e-acsl/options.mli

src/plugins/e-acsl/pre_analysis.ml

src/plugins/e-acsl/pre_analysis.mli