v4l-utils: fix musl

srcpkgs/v4l-utils/patches/musl.patch

@@ -0,0 +1,27 @@
+--- utils/ir-ctl/ir-ctl.c.orig	2017-01-25 17:27:44.373665101 +0000
++++ utils/ir-ctl/ir-ctl.c	2017-01-25 17:27:51.052665445 +0000
+@@ -44,6 +44,24 @@
+ 
+ # define N_(string) string
+ 
++#ifndef TEMP_FAILURE_RETRY
++#define TEMP_FAILURE_RETRY(expression) \
++  (__extension__                                                   \
++    ({ long int __result;                                          \
++       do __result = (long int) (expression);                      \
++       while (__result == -1L && errno == EINTR);                  \
++       __result; }))
++#endif
++
++#ifndef strndupa
++#define strndupa(s, n) \
++       (__extension__ ({const char *__in = (s);                    \
++                        size_t __len = strnlen (__in, (n)) + 1;    \
++                        char *__out = (char *) alloca (__len);     \
++                        __out[__len-1] = '\0';                     \
++                        (char *) memcpy (__out, __in, __len-1);}))
++#endif
++
+ 
+ /* See drivers/media/rc/ir-lirc-codec.c line 23 */
+ #define LIRCBUF_SIZE	512