[patch/testsuite/mi] mi*-var-*.exp: use gdb_get_line_number

[Michael Chastain]

Committed.

Next in line: files that use gdb.mi/pthreads.c:
  gdb669.exp mi-pthreads.exp mi2-pthreads.exp

2004-08-16  Michael Chastain  <mec.gnu@mindspring.com>

	* gdb.mi/mi-var-block.exp: Use gdb_get_line_number.  Remove
	reference to bug-gnu@prep.ai.mit.edu.
	* gdb.mi/mi-var-child.exp: Likewise.
	* gdb.mi/mi-var-cmd.exp: Likewise.
	* gdb.mi/mi-var-display.exp: Likewise.
	* gdb.mi/mi2-var-block.exp: Likewise.
	* gdb.mi/mi2-var-child.exp: Likewise.
	* gdb.mi/mi2-var-cmd.exp: Likewise.
	* gdb.mi/mi2-var-display.exp: Likewise.