IVGCVSW-5095 Make timeline report the Linux Thread ID not the pthread ID

Change-Id: Id69519fd9ef57716de4e389ed4156710a904c701
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/Android.mk b/Android.mk
index 38b2ad4..781aba6 100644
--- a/Android.mk
+++ b/Android.mk
@@ -131,6 +131,7 @@
         src/armnnUtils/VerificationHelpers.cpp \
         src/armnnUtils/Filesystem.cpp \
         src/armnnUtils/Processes.cpp \
+        src/armnnUtils/Threads.cpp \
         src/armnnUtils/Transpose.cpp \
         src/armnn/layers/ActivationLayer.cpp \
         src/armnn/layers/AdditionLayer.cpp \