fix(main/golang): use Termux tmp directory as fallback when TMPDIR is not set

packages/golang/build.sh

@@ -5,7 +5,7 @@ TERMUX_PKG_MAINTAINER="@termux"
 _MAJOR_VERSION=1.20
 # Use the ~ deb versioning construct in the future:
 TERMUX_PKG_VERSION=3:${_MAJOR_VERSION}.4
-TERMUX_PKG_REVISION=1
+TERMUX_PKG_REVISION=2
 TERMUX_PKG_SRCURL=https://storage.googleapis.com/golang/go${TERMUX_PKG_VERSION#*:}.src.tar.gz
 TERMUX_PKG_SHA256=9f34ace128764b7a3a4b238b805856cc1b2184304df9e5690825b0710f4202d6
 TERMUX_PKG_DEPENDS="clang"

packages/golang/src-os-file_unix.go.patch

@@ -0,0 +1,12 @@
+diff -uNr go/src/os/file_unix.go go.mod/src/os/file_unix.go
+--- go/src/os/file_unix.go	2023-04-26 18:32:02.000000000 +0300
++++ go.mod/src/os/file_unix.go	2023-05-21 19:08:51.516090953 +0300
+@@ -339,7 +339,7 @@
+ 	dir := Getenv("TMPDIR")
+ 	if dir == "" {
+ 		if runtime.GOOS == "android" {
+-			dir = "/data/local/tmp"
++			dir = "@TERMUX_PREFIX@/tmp"
+ 		} else {
+ 			dir = "/tmp"
+ 		}