[m-rev.] trivial diff: update instructions for building from git

[Julien Fischer]

Update instructions for building from git.

INSTALL.git:
README.bootstrap:
     As above.

Julien.

diff --git a/INSTALL.git b/INSTALL.git
index 1f44aac..fce20ac 100755
--- a/INSTALL.git
+++ b/INSTALL.git
@@ -9,9 +9,7 @@
  #
  # You also need autoconf (version 2.58 or later) (and hence GNU m4) installed.
  #
-# Step 0.  aclocal -I m4
-#
-# Step 1.  autoconf
+# Step 1.  ./prepare.sh
  #
  # Step 2.  ./configure
  #
@@ -44,8 +42,7 @@

  parallel=-j3

-aclocal -I m4 &&
-autoconf &&
+./prepare.sh &&
  ./configure &&
  touch Mmake.params &&
  touch Mercury.options &&
diff --git a/README.bootstrap b/README.bootstrap
index a7ad2a2..6b55cd1 100644
--- a/README.bootstrap
+++ b/README.bootstrap
@@ -48,8 +48,7 @@ distribution by issuing the following command sequence:

  ----
  make realclean
-aclocal -I m4
-autoconf
+./prepare.sh
  ./configure
  make
  sudo make install