BUG/MINOR: displayed PCRE version is running release

pcre_version() returns the running PCRE release, not the release
haproxy was built with.

This simple string fix should be backported to supported releases,
as the output may be confusing.
diff --git a/src/haproxy.c b/src/haproxy.c
index 6665ba7..98a6a17 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -352,7 +352,7 @@
 #endif
 
 #ifdef USE_PCRE
-	printf("Built with PCRE version : %s", pcre_version());
+	printf("Running on PCRE version : %s", pcre_version());
 	printf("\nPCRE library supports JIT : ");
 #ifdef USE_PCRE_JIT
 	{