Merge remote-tracking branch 'origin/maint'

* origin/maint:
  parser: accept #line NUM
  m4: use a safer pattern to enable/disable output
  tests: beware of gnulib's need for config.h
  gnulib: update
  yacc.c, glr.c: check and fix the display of locations
  formatting changes
  glr.c: remove stray macro

Conflicts:
	data/c.m4
	data/glr.cc
	data/lalr1.cc
	data/lalr1.java
	data/location.cc
	data/stack.hh
	data/yacc.c
	src/scan-gram.l

tests/skeletons.at

@@ -114,10 +114,10 @@ main (void)
 }
 ]])
 
-AT_DATA([[input-cmd-line.y]],
+AT_DATA_GRAMMAR([[input-cmd-line.y]],
 [AT_GRAM])
 
-AT_DATA([[input-gram.y]],
+AT_DATA_GRAMMAR([[input-gram.y]],
 [[%skeleton "yacc.c"]
 AT_GRAM])