libsndfile: fix tmpdir

packages/libsndfile/build.sh

@@ -2,7 +2,7 @@ TERMUX_PKG_HOMEPAGE=http://www.mega-nerd.com/libsndfile
 TERMUX_PKG_DESCRIPTION="Library for reading/writing audio files"
 # Use a git master snapshot until 1.0.29 is released:
 TERMUX_PKG_VERSION=1.0.29~pre1
-TERMUX_PKG_REVISION=1
+TERMUX_PKG_REVISION=2
 TERMUX_PKG_SRCURL=https://github.com/erikd/libsndfile/archive/826d5296da54c016e3cb0f7f00de3b9e295b9c4a.zip
 TERMUX_PKG_SHA256=84651201a8468c448f1fd172a48ccf47f3761d23fd0f59bcaaf908050e9eeb7c
 TERMUX_PKG_DEPENDS="libflac, libvorbis"

packages/libsndfile/tmpdir.patch

@@ -0,0 +1,12 @@
+diff -uNr libsndfile/src/common.c libsndfile.mod/src/common.c
+--- libsndfile/src/common.c	2017-10-31 10:30:54.000000000 +0200
++++ libsndfile.mod/src/common.c	2018-06-19 17:08:45.344367164 +0300
+@@ -1730,7 +1730,7 @@
+ 		tmpdir = getenv ("TEMP") ;
+ 	else
+ 	{	tmpdir = getenv ("TMPDIR") ;
+-		tmpdir = tmpdir == NULL ? "/tmp" : tmpdir ;
++		tmpdir = tmpdir == NULL ? "@TERMUX_PREFIX@/tmp" : tmpdir ;
+ 		} ;
+ 
+ 	if (tmpdir && access (tmpdir, R_OK | W_OK | X_OK) == 0)