upm: Link with libatomic on clang/x86

This is needed for atomic<double> which clang does not use intrinsic
function for on 32bit x86

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-extended/upm/upm/0001-nmea_gps-Link-with-latomic.patch

@@ -0,0 +1,27 @@
+From 996d37fc0b7177ee57788399b9140032d5de2765 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 18 Nov 2019 15:50:02 -0800
+Subject: [PATCH] nmea_gps: Link with latomic
+
+clang/x86 ends up with missing symbols for atomics due to atomic<double>
+with libstdc++, it works ok with libc++
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ src/nmea_gps/CMakeLists.txt | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/nmea_gps/CMakeLists.txt b/src/nmea_gps/CMakeLists.txt
+index b3fb6591..5280bfed 100644
+--- a/src/nmea_gps/CMakeLists.txt
++++ b/src/nmea_gps/CMakeLists.txt
+@@ -6,4 +6,4 @@ upm_mixed_module_init (NAME nmea_gps
+     CPP_SRC nmea_gps.cxx
+     FTI_SRC nmea_gps_fti.c
+     CPP_WRAPS_C
+-    REQUIRES mraa utilities-c ${CMAKE_THREAD_LIBS_INIT})
++    REQUIRES mraa utilities-c atomic ${CMAKE_THREAD_LIBS_INIT})
+-- 
+2.24.0
+

meta-oe/recipes-extended/upm/upm_git.bb

@@ -15,6 +15,8 @@ SRC_URI = "git://github.com/intel-iot-devkit/${BPN}.git;protocol=http \
            file://0001-Use-stdint-types.patch \
            "
 
+SRC_URI_append_toolchain-clang_x86 = " file://0001-nmea_gps-Link-with-latomic.patch "
+
 S = "${WORKDIR}/git"
 
 # Depends on mraa which only supports x86 and ARM for now