Identify gcc-10+ as a good compiler.

Index: work/glibc-2.19/configure
===================================================================
--- glibc-2.19/configure
+++ glibc-2.19/configure
@@ -4710,7 +4710,7 @@ $as_echo_n "checking version of $CC... "
   ac_prog_version=`$CC -v 2>&1 | sed -n 's/^.*version \([egcygnustpi-]*[0-9.]*\).*$/\1/p'`
   case $ac_prog_version in
     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    4.[4-9].* | 4.[1-9][0-9].* | [5-9].* )
+    4.[4-9].* | 4.[1-9][0-9].* | [5-9].* | [1-9][0-9].* )
        ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
     *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;