Fixed grammar in PCRE JIT error log message.

src/core/ngx_regex.c

diff --git a/src/core/ngx_regex.c b/src/core/ngx_regex.c
index 8dba4e1..a7137fe 100644
--- a/src/core/ngx_regex.c
+++ b/src/core/ngx_regex.c
@@ -403,7 +403,7 @@
     }
 #else
     ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
-                       "nginx was build without PCRE JIT support");
+                       "nginx was built without PCRE JIT support");
     *fp = 0;
 #endif