force C locale when using [a-z] in sed expressions

PR: 1283
Submitted by: Mike Frysinger

config

diff --git a/config b/config
index 82c57ef..6583959 100755
--- a/config
+++ b/config
@@ -406,7 +406,7 @@
   CC=gcc
   # then strip off whatever prefix egcs prepends the number with...
   # Hopefully, this will work for any future prefixes as well.
-  GCCVER=`echo $GCCVER | sed 's/^[a-zA-Z]*\-//'`
+  GCCVER=`echo $GCCVER | LC_ALL=C sed 's/^[a-zA-Z]*\-//'`
   # Since gcc 3.1 gcc --version behaviour has changed.  gcc -dumpversion
   # does give us what we want though, so we use that.  We just just the
   # major and minor version numbers.