patch locale settings

[Dmitry Goncharov]

Multiple tests fail when locale related env variables (such as LANG or
LC_MESSAGES) are set to some regional setting.

regards, Dmitry

diff --git a/tests/run_make_tests b/tests/run_make_tests
index b68b784..7b3719e 100755
--- a/tests/run_make_tests
+++ b/tests/run_make_tests
@@ -1,2 +1,3 @@
 #!/bin/sh
+export LC_ALL=C
 exec perl $0.pl ${1+"$@"}