wiredtiger: fix musl

srcpkgs/wiredtiger/patches/musl-execinfo.patch

@@ -0,0 +1,28 @@
+--- ext/test/fail_fs/fail_fs.c	2017-05-26 20:37:54.000000000 +0200
++++ ext/test/fail_fs/fail_fs.c	2017-05-27 23:53:50.203903712 +0200
+@@ -35,7 +35,9 @@
+ #include <unistd.h>
+ #include <fcntl.h>
+ #include <sys/stat.h>
++#ifdef __GLIBC__
+ #include <execinfo.h>
++#endif
+ 
+ #include <wiredtiger_ext.h>
+ #include "queue.h"
+@@ -697,6 +699,7 @@
+ 		(void)wtext->msg_printf(wtext, session,
+ 		    "fail_fs: %s: simulated failure after %" PRId64
+ 		    " %s operations", fail_fh->iface.name, nops, opkind);
++#ifdef __GLIBC__
+ #ifdef __FreeBSD__
+ 		btret = backtrace(bt, sizeof(bt) / sizeof(bt[0]));
+ #else
+@@ -708,6 +711,7 @@
+ 				    btstr[i]);
+ 			free(btstr);
+ 		}
++#endif
+ 	}
+ 	return (EIO);
+ }