Protoc check - correctly match multi-digit major versions

(cherry picked from commit 69a2946)

config/ola.m4

@@ -51,7 +51,7 @@ elif test -n "$1" ; then
   # libprotoc 2.4.1
   # libprotoc 23.3
   # The first sed ensures all versions have major, minor, patch, by adding a .0 on the end of ones missing it
-  [protoc_version=`$PROTOC --version 2>&1 | grep 'libprotoc' | sed 's/\([^\.0-9][0-9][0-9]*\.[0-9][0-9]*\)$/\1\.0/g' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`]
+  [protoc_version=`$PROTOC --version 2>&1 | grep 'libprotoc' | sed 's/\([^\.0-9][0-9][0-9]*\.[0-9][0-9]*\)$/\1\.0/g' | sed 's/[^0-9]*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`]
   [required=$1]
   [required_major=`echo $required | sed 's/[^0-9].*//'`]
   [required_minor=`echo $required | sed 's/[0-9][0-9]*\.\([0-9][0-9]*\)\.[0-9][0-9]*/\1/'`]