[RFC/PATCH] newlib: enable automatic dependency generation

This was disabled as part of the migration away from the cygnus option
as that implied no-dependencies.

We currently have 1-to-1 updates enabled -- if you touch a .c file,
the corresponding .o file will be rebuilt.  But if you touch a header
file, none of the files using that get rebuilt.

Not sure how much we care.  I think we want this since it's probably
what people are expecting.  It increases the size of the Makefile a
bit, and adds a little build overhead to generate & process.
---
 newlib/Makefile.in  | 38502 ++++++++++++++++++++++++++++++++++--------
 newlib/acinclude.m4 |     2 +-
 newlib/aclocal.m4   |   316 +
 newlib/configure    |   442 +
 4 files changed, 32111 insertions(+), 7151 deletions(-)

diff --git a/newlib/acinclude.m4 b/newlib/acinclude.m4
index 424460dc76a8..9e4834987716 100644
--- a/newlib/acinclude.m4
+++ b/newlib/acinclude.m4
@@ -114,7 +114,7 @@ AC_SUBST(abs_newlib_basedir)
 
 AC_CANONICAL_HOST
 
-AM_INIT_AUTOMAKE([foreign no-installinfo no-dependencies no-dist no-define subdir-objects 1.15.1])
+AM_INIT_AUTOMAKE([foreign no-installinfo no-dist no-define subdir-objects 1.15.1])
 AM_MAINTAINER_MODE
 AM_SILENT_RULES(yes)
 
-- 
2.34.1