Add patch to swift-corelibs-foundation:

Dont use posix_spawnattr on Android. It available only from API>=28

Author: andriydruk

patches/swift-corelibs-foundation/0004-dont-use-posix_spawnattr-on-android.patch

@@ -0,0 +1,45 @@
+From 49dac2443c37c2bff59c9294c096b2948cace43b Mon Sep 17 00:00:00 2001
+From: Anton Pogonets <apogonets@readdle.com>
+Date: Fri, 9 Apr 2021 13:38:14 +0300
+Subject: [PATCH] Dont use posix_spawnattr on Android. It available only from
+ API>=28
+
+---
+ Sources/Foundation/Process.swift | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/Sources/Foundation/Process.swift b/Sources/Foundation/Process.swift
+index 7d6a1a39..cfe4cd19 100644
+--- a/Sources/Foundation/Process.swift
++++ b/Sources/Foundation/Process.swift
+@@ -950,6 +950,8 @@ open class Process: NSObject, @unchecked Sendable {
+             ])
+         }
+ #endif
++
++#if !os(Android)
+         try _throwIfPosixError(posix_spawnattr_init(&spawnAttrs))
+         try _throwIfPosixError(posix_spawnattr_setflags(&spawnAttrs, .init(POSIX_SPAWN_SETPGROUP)))
+ #if canImport(Darwin)
+@@ -964,6 +966,7 @@ open class Process: NSObject, @unchecked Sendable {
+             }
+             try _throwIfPosixError(_CFPosixSpawnFileActionsAddClose(fileActions, fd))
+         }
++#endif
+ #endif
+ 
+         // Unsafe fallback for systems missing posix_spawn_file_actions_addchdir[_np]
+@@ -995,8 +998,9 @@ open class Process: NSObject, @unchecked Sendable {
+                 throw _NSErrorWithErrno(errno, reading: true, path: launchPath)
+             }
+         })
++#if !os(Android)
+         posix_spawnattr_destroy(&spawnAttrs)
+-
++#endif
+         // Close the write end of the input and output pipes.
+         if let pipe = standardInput as? Pipe {
+             pipe.fileHandleForReading.closeFile()
+-- 
+2.46.0
+