config/git: import suckless sbase

i currently use the output of sha512sum in several
places of xbmk, which is a bit unreliable in case
output changes.

other cases where i use util outputs in variables
are probably reliable, because i'm using mostly
posix utilities in those.

to mitigate this, i now import suckless sbase, which
has a reasonable sha512sum implementation.

*every* binary it builds is being placed in build.list,
because i'll probably start using more of them.

for example, i may start modifying the "date"
implementation, adding the GNU-specific options that
i need as mentioned on init.sh

i'm importing it in util/ because the sha512sum
util is needed for verifying project sources, so
if sbase itself is a "project source", that means
we can into a chicken and egg bootstrapping problem.

this is sbase at revision:
055cc1ae1b3a13c3d8f25af0a4a3316590efcd48

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/sbase/util.h

@@ -0,0 +1,97 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/types.h>
+
+#include <regex.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "arg.h"
+#include "compat.h"
+
+#define UTF8_POINT(c) (((c) & 0xc0) != 0x80)
+
+#undef MIN
+#define MIN(x,y)  ((x) < (y) ? (x) : (y))
+#undef MAX
+#define MAX(x,y)  ((x) > (y) ? (x) : (y))
+#undef LIMIT
+#define LIMIT(x, a, b)  (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
+
+#define LEN(x) (sizeof (x) / sizeof *(x))
+
+extern char *argv0;
+
+void *ecalloc(size_t, size_t);
+void *emalloc(size_t);
+void *erealloc(void *, size_t);
+#undef reallocarray
+void *reallocarray(void *, size_t, size_t);
+void *ereallocarray(void *, size_t, size_t);
+char *estrdup(const char *);
+char *estrndup(const char *, size_t);
+void *encalloc(int, size_t, size_t);
+void *enmalloc(int, size_t);
+void *enrealloc(int, void *, size_t);
+void *enreallocarray(int, void *, size_t, size_t);
+char *enstrdup(int, const char *);
+char *enstrndup(int, const char *, size_t);
+
+void enfshut(int, FILE *, const char *);
+void efshut(FILE *, const char *);
+int  fshut(FILE *, const char *);
+
+void enprintf(int, const char *, ...);
+void eprintf(const char *, ...);
+void weprintf(const char *, ...);
+void xvprintf(const char *, va_list);
+
+int confirm(const char*, ...);
+
+double estrtod(const char *);
+
+#undef strcasestr
+#define strcasestr xstrcasestr
+char *strcasestr(const char *, const char *);
+
+#undef strlcat
+#define strlcat xstrlcat
+size_t strlcat(char *, const char *, size_t);
+size_t estrlcat(char *, const char *, size_t);
+#undef strlcpy
+#define strlcpy xstrlcpy
+size_t strlcpy(char *, const char *, size_t);
+size_t estrlcpy(char *, const char *, size_t);
+
+#undef strsep
+#define strsep xstrsep
+char *strsep(char **, const char *);
+
+void strnsubst(char **, const char *, const char *, size_t);
+
+/* regex */
+int enregcomp(int, regex_t *, const char *, int);
+int eregcomp(regex_t *, const char *, int);
+
+/* io */
+ssize_t writeall(int, const void *, size_t);
+int concat(int, const char *, int, const char *);
+
+/* misc */
+void enmasse(int, char **, int (*)(const char *, const char *, int));
+void fnck(const char *, const char *, int (*)(const char *, const char *, int), int);
+mode_t getumask(void);
+char *humansize(off_t);
+mode_t parsemode(const char *, mode_t, mode_t);
+off_t parseoffset(const char *);
+void putword(FILE *, const char *);
+#undef strtonum
+#define strtonum xstrtonum
+long long strtonum(const char *, long long, long long, const char **);
+long long enstrtonum(int, const char *, long long, long long);
+long long estrtonum(const char *, long long, long long);
+size_t unescape(char *);
+int mkdirp(const char *, mode_t, mode_t);
+#undef memmem
+#define memmem xmemmem
+void *memmem(const void *, size_t, const void *, size_t);