gnulib: Update gnulib version and drop most gnulib patches

In addition to the changes carried in our gnulib patches, several
Coverity and code hygiene fixes that were previously downstream are also
included in this 3-year gnulib increment.

Unfortunately, fix-width.patch is retained.

Bump minimum autoconf version from 2.63 to 2.64 and automake from 1.11
to 1.14, as required by gnulib.

Sync bootstrap script itself with gnulib.

Update regexp module for new dynarray dependency.

Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

config.h.in

@@ -69,7 +69,74 @@
 #  define _GNU_SOURCE 1
 
 #  ifndef _GL_INLINE_HEADER_BEGIN
+/*
+ * gnulib gets configured against the host, not the target, and the rest of
+ * our buildsystem works around that.  This is difficult to avoid as gnulib's
+ * detection requires a more capable system than our target.  Instead, we
+ * reach in and set values appropriately - intentionally setting more than the
+ * bare minimum.  If, when updating gnulib, something breaks, there's probably
+ * a change needed here or in grub-core/Makefile.core.def.
+ */
+#    define SIZE_MAX ((size_t) -1)
+#    define _GL_ATTRIBUTE_ALLOC_SIZE(args) \
+    __attribute__ ((__alloc_size__ args))
+#    define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#    define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+#    define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
 #    define _GL_ATTRIBUTE_CONST __attribute__ ((const))
+#    define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute ((__malloc__ (f, i)))
+#    define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
+#    define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+#    define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+#    define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE \
+    __attribute__ ((externally_visible))
+#    define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#    define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+#    define _GL_ATTRIBUTE_MALLOC __attribute__ ((malloc))
+#    define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+#    define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+#    define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+#    define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+#    define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+#    define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+#    define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
+#    define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#    define _GL_ATTRIBUTE_RETURNS_NONNULL \
+    __attribute__ ((__returns_nonnull__))
+#    define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+#    define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#    define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
+#    define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))
+#    define _GL_GNUC_PREREQ GNUC_PREREQ
+#    define _GL_INLINE inline
+#    define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
+
+/* We can't use __has_attribute for these because gcc-5.1 is too old for
+ * that.  Everything above is present in that version, though. */
+#    if __GNUC__ >= 7
+#      define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((fallthrough))
+#    else
+#      define _GL_ATTRIBUTE_FALLTHROUGH /* empty */
+#    endif
+
+#    ifndef ASM_FILE
+typedef __INT_FAST32_TYPE__ int_fast32_t;
+typedef __UINT_FAST32_TYPE__ uint_fast32_t;
+#    endif
+
+/* Ensure ialloc nests static/non-static inline properly. */
+#    define IALLOC_INLINE static inline
+
+/*
+ * gnulib uses these for blocking out warnings they can't/won't fix.  gnulib
+ * also makes the decision about whether to provide a declaration for
+ * reallocarray() at compile-time, so this is a convenient place to override -
+ * it's used by the ialloc module, which is used by base64.
+ */
+#    define _GL_INLINE_HEADER_BEGIN _Pragma ("GCC diagnostic push")	\
+    void *								\
+    reallocarray (void *ptr, unsigned int nmemb, unsigned int size);
+#    define _GL_INLINE_HEADER_END   _Pragma ("GCC diagnostic pop")
 
 /*
  * We don't have an abort() for gnulib to call in regexp.  Because gnulib is