postgresql: Update to 9.4.15

Update to 9.4.15 to pickup "a variety of fixes" from 9.4.14.
Included are fixes for CVE-2017-15098 and CVE-2017-12172.

Upstream release notes:
https://www.postgresql.org/docs/9.4/static/release-9-4-15.html

Backporting all supported stable branches to this version should be
considered.

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
(cherry picked from commit 9fb1739a7a)
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-support/postgresql/postgresql_9.4.15.bb

@@ -11,5 +11,5 @@ do_compile_prepend_libc-musl() {
     sed -i -e 's/\-lnsl//g' ${B}/src/Makefile.global
 }
 
-SRC_URI[md5sum] = "2b7e2a2b0232063b68b3f8a0a01902bd"
-SRC_URI[sha256sum] = "8e7df23a104b057b360d03180ebcb67f645e198a4a0bee94bf56b2bc9505ec6b"
+SRC_URI[md5sum] = "0aada0833a9208ae5fab966c73c39379"
+SRC_URI[sha256sum] = "12bfb3c7e8e45515ef921ad365e122682a5c4935dcc0032644433af2de31acc4"