Integrate build and documentation of Ltac2

Since Ltac2 cannot be put under the stdlib logical root (some file names
would clash), we move it to the `user-contrib` directory, to avoid adding
another hardcoded path in `coqinit.ml`, following a suggestion by @ejgallego.

Thanks to @Zimmi48 for the thorough documentation review and the
numerous suggestions.

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 2b5d2cea16..c4404d13c7 100644
--- a/Makefile
+++ b/Makefile
@@ -66,7 +66,7 @@ FIND_SKIP_DIRS:='(' \
 ')' -prune -o
 
 define find
- $(shell find . $(FIND_SKIP_DIRS) '(' -name $(1) ')' -print | sed 's|^\./||')
+ $(shell find . user-contrib/Ltac2 $(FIND_SKIP_DIRS) '(' -name $(1) ')' -print | sed 's|^\./||')
 endef
 
 define findindir