Bazel: fix link for PCRE, now that ftp.pcre.org is gone.

Change-Id: If201af2869f4745fc3beec8ce30ff71cb824b5c8
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
Reviewed-on: https://nginx-review.googlesource.com/c/nginx/+/3980
Reviewed-by: Patryk Lesiewicz <patryk@google.com>

bazel/repositories.bzl

diff --git a/bazel/repositories.bzl b/bazel/repositories.bzl
index d4edcff..0090c5a 100644
--- a/bazel/repositories.bzl
+++ b/bazel/repositories.bzl
@@ -59,7 +59,7 @@
         build_file = "@nginx//bazel/external:pcre.BUILD",
         sha256 = "aecafd4af3bd0f3935721af77b889d9024b2e01d96b58471bd91a3063fb47728",
         strip_prefix = "pcre-8.44",
-        url = "https://ftp.pcre.org/pub/pcre/pcre-8.44.tar.gz",
+        url = "https://downloads.sourceforge.net/project/pcre/pcre/8.44/pcre-8.44.tar.gz",
     )
 
     # zlib