[binutils-gdb] Fix indentation in gdb.mi/mi-stack.exp

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 9b73db36739a72d216eb14d35edac2acfca7faa3 ***

Author: Simon Marchi <simon.marchi@polymtl.ca>
Branch: master
Commit: 9b73db36739a72d216eb14d35edac2acfca7faa3

Fix indentation in gdb.mi/mi-stack.exp

This patch fixes the indentation in gdb.mi/mi-stack.exp, which is a bit
inconsistent.

gdb/testsuite/ChangeLog:

	* gdb.mi/mi-stack.exp: Fix indentation.