dbus-wait: bump srcrev

This upgrade only includes one new commit:
64bc7c8 SECURITY.md: Add file

(From OE-Core rev: ea1705501c2e8933a94b5a1d19f6e36d46a5b481)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/dbus-wait/dbus-wait_git.bb

@@ -7,7 +7,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263"
 
 DEPENDS = "dbus"
 
-SRCREV = "6cc6077a36fe2648a5f993fe7c16c9632f946517"
+SRCREV = "64bc7c8fae61ded0c4e555aa775911f84c56e438"
 PV = "0.1+git"
 
 SRC_URI = "git://git.yoctoproject.org/${BPN};branch=master;protocol=https"