phosphor-pid-control: srcrev bump 64f072a74c..40be36ac31

Patrick Venture (1):
      add missing gmock header: read|write interface mock

Change-Id: Ic8125cd46f4b878179f800951210679073d95469
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-phosphor/fans/phosphor-pid-control.bb b/common/recipes-phosphor/fans/phosphor-pid-control.bb
index 75c4547..731ab52 100644
--- a/common/recipes-phosphor/fans/phosphor-pid-control.bb
+++ b/common/recipes-phosphor/fans/phosphor-pid-control.bb
@@ -8,7 +8,7 @@
 PR = "r1"
 
 SRC_URI = "git://github.com/openbmc/phosphor-pid-control"
-SRCREV = "64f072a74c895de24b2ec7a5c829224e6abdf516"
+SRCREV = "40be36ac31a4756498a1f297324129fe1271b726"
 S = "${WORKDIR}/git"
 
 inherit autotools pkgconfig