GitLab

This patch contains several fixes for ndk-gdb:

- Allow it to run properly on Darwin, where 'mktemp' will return an
  error if used without parameters. Note that 'mktemp -t <pattern>'
  does not work the same on Linux and Darwin, so use an invocation
  that is supported by all host platforms (Cygwin included).

- Ensure that ANDROID_NDK_ROOT is defined as an absolute path,
  to avoid problems when the script is invoked as in:

      cd $NDKROOT
      ./ndk-gdb --project=/path/to/project/

- The _adb_var_shell redirection was buggy and created files named
  "&1" and "&2" in the current directory for no good reason.

Fix for bug 4156117

Change-Id: I8dbd29bd33db808289755055a6ff5c9ccd181bfc