[patch, testsuite] skip gdb.base/gdbinit-history.exp on remote hosts

[Sandra Loosemore <sandra at codesourcery dot com>]

This patch is very similar to the one I posted for 
gdb.base/gdbhistsize-history.exp yesterday:

https://sourceware.org/ml/gdb-patches/2015-09/msg00355.html

The rationale is the same -- the test manipulates environment variables 
in the .exp script.  When GDB is run on a remote host it doesn't inherit 
those environment variables, so the tests cannot possibly work.

OK to commit?

-Sandra

2015-09-16  Sandra Loosemore  <sandra@codesourcery.com>

	gdb/testsuite/
	* gdb.base/gdbinit-history.exp: Skip for remote-host testing.

diff --git a/gdb/testsuite/gdb.base/gdbinit-history.exp b/gdb/testsuite/gdb.base/gdbinit-history.exp
index 85ef12f..3f726d1 100644
--- a/gdb/testsuite/gdb.base/gdbinit-history.exp
+++ b/gdb/testsuite/gdb.base/gdbinit-history.exp
@@ -17,6 +17,14 @@
 
 # Test the setting of "history size" via $HOME/.gdbinit
 
+# This test depends on being able to set $HOME and $GDBHISTSIZE.
+# We cannot expect remote hosts to see environment variables set on the
+# local machine.
+
+if { [is_remote host] } {
+    unsupported "can't set environment variables on remote host"
+    return -1
+}
 
 # Check that the history size is properly set to SIZE when reading the .gdbinit
 # file located in HOME with the environment variable GDBHISTSIZE optionally