dart: fix /tmp path

packages/dart/build.sh

@@ -2,6 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://www.dartlang.org/
 TERMUX_PKG_DESCRIPTION="Dart is a general-purpose programming language"
 TERMUX_PKG_LICENSE="BSD"
 TERMUX_PKG_VERSION=2.3.2
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SKIP_SRC_EXTRACT=yes
 TERMUX_PKG_BUILD_IN_SRC=yes
 

packages/dart/sdk-runtime-bin-directory_android.cc.patch

@@ -0,0 +1,22 @@
+--- /home/vishal/.termux-build/dart/src/sdk/runtime/bin/directory_android.cc	2019-06-14 00:27:54.559512261 +0530
++++ /home/vishal/.termux-build/dart/src/sdk/runtime/bin/directory_android.cc	2019-06-14 00:32:21.470848945 +0530
+@@ -429,7 +429,7 @@
+   // TODO(4413): In the long run, when running in an application we should
+   // probably use the appropriate directory from the Android API,
+   // probably what File.createTempFile uses.
+-  const char* kAndroidTempDir = "/data/local/tmp";
++  const char* kAndroidTempDir = "@TERMUX_PREFIX@/tmp";
+   struct stat st;
+   if (stat(kAndroidTempDir, &st) != 0) {
+     mkdir(kAndroidTempDir, 0777);
+--- /home/vishal/.termux-build/dart/src/sdk/runtime/vm/os_android.cc	2019-06-14 23:47:25.713639563 +0530
++++ /home/vishal/.termux-build/dart/src/sdk/runtime/vm/os_android.cc	2019-06-14 23:47:19.743694949 +0530
+@@ -42,7 +42,7 @@
+       return;
+     }
+     intptr_t pid = getpid();
+-    char* filename = OS::SCreate(NULL, "/tmp/perf-%" Pd ".map", pid);
++    char* filename = OS::SCreate(NULL, "@TERMUX_PREFIX@/tmp/perf-%" Pd ".map", pid);
+     out_file_ = (*file_open)(filename, true);
+     free(filename);
+   }