build: update to latest gnulib

It's been a while, and we're between releases, so now's as good
a time as any to resync.  This also fixes a build-breaker on
cygwin, where cygwin 1.7.11 introduced a header bug in <termios.h>.

* .gnulib: Update to latest.
* bootstrap: Resync.
* cfg.mk (sc_prohibit_strncmp): Copy upstream changes to
sc_prohibit_strcmp.

.gnulib

@@ -1 +1 @@
-Subproject commit e9e8aba12af3c903edd422fa036a356c5b2f313a
+Subproject commit b856fadc1c8dcb53e7efcbb2d0ae7edc022fdb6a

bootstrap

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2012-01-21.16; # UTC
+scriptversion=2012-02-11.09; # UTC
 
 # Bootstrap this package from checked-out sources.
 
@@ -423,7 +423,7 @@ check_versions() {
       $use_git || continue
     fi
     # Honor $APP variables ($TAR, $AUTOCONF, etc.)
-    appvar=`echo $app | tr '[a-z]-' '[A-Z]_'`
+    appvar=`echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_'`
     test "$appvar" = TAR && appvar=AMTAR
     case $appvar in
         GZIP) ;; # Do not use $GZIP:  it contains gzip options.
@@ -604,7 +604,7 @@ if $bootstrap_sync; then
 fi
 
 gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
-<$gnulib_tool || exit
+<$gnulib_tool || exit $?
 
 # Get translations.
 

cfg.mk

@@ -346,8 +346,9 @@ sc_prohibit_access_xok:
 
 # Similar to the gnulib maint.mk rule for sc_prohibit_strcmp
 # Use STREQLEN or STRPREFIX rather than comparing strncmp == 0, or != 0.
+snp_ = strncmp *\(.+\)
 sc_prohibit_strncmp:
-	@grep -nE '! *str''ncmp *\(|\<str''ncmp *\(.+\) *[!=]='		\
+	@grep -nE '! *strncmp *\(|\<$(snp_) *[!=]=|[!=]= *$(snp_)'	\
 	    $$($(VC_LIST_EXCEPT))					\
 	  | grep -vE ':# *define STR(N?EQLEN|PREFIX)\(' &&		\
 	  { echo '$(ME): use STREQLEN or STRPREFIX instead of str''ncmp' \