firebird: fix build with glibc >= 2.28

resolves void-linux/void-packages#3878

srcpkgs/firebird/patches/007-libio.patch

@@ -0,0 +1,14 @@
+--- src/jrd/perf.h	2018-01-05
++++ src/jrd/perf.h	2018-08-20
+@@ -31,10 +31,6 @@
+ #ifndef JRD_PERF_H
+ #define JRD_PERF_H
+ 
+-#ifdef LINUX
+-#include <libio.h>
+-#endif
+-
+ #ifdef HAVE_TIMES
+ #include <sys/types.h>
+ #include <sys/times.h>
+

srcpkgs/firebird/patches/007-musl-libio.patch

@@ -1,11 +0,0 @@
---- src/jrd/perf.h	2015-03-27 14:46:58.000000000 +0100
-+++ src/jrd/perf.h	2016-02-24 15:38:06.674716837 +0100
-@@ -31,7 +31,7 @@
- #ifndef JRD_PERF_H
- #define JRD_PERF_H
- 
--#ifdef LINUX
-+#if defined(LINUX) && defined(__GLIBC__)
- #include <libio.h>
- #endif
-