coccinelle doesn't compile with pcre newer than 7.1.1 with ocaml 4.00.0 and
4.01.0, so I am fixing the version of pcre needed by coccinelle to 7.1.1
since not everybody is working with a bleeding edge 4.02.0 ocaml compiler
= 7.1.1 moved to <= 7.1.1 for the pcre dependency, as required by master yallop
Merge pull request #3145 from UnixJunkie/allow_cocci_to_compile_w_ocaml_4.00.0_and_4.01.0

allow coccinelle to compile w ocaml 4.00.0 and 4.01.0