clean up.

programming/library/libdispatch/files/avoid-libkqueue.patch

@@ -0,0 +1,11 @@
+--- tests/dispatch_test.c.orig
++++ tests/dispatch_test.c
+@@ -30,7 +30,7 @@
+ #include <stdio.h>
+ #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
+ #include <unistd.h>
+-#if __has_include(<sys/event.h>)
++#if __has_include(<sys/event.h>) && !defined(__linux__)
+ #define HAS_SYS_EVENT_H 1
+ #include <sys/event.h>
+ #else