lttng-ust: Link with libatomic on 32bit x86

Clang generates _atomic_store calls

Signed-off-by: Khem Raj <[email protected]>

conf/nonclangable.conf

@@ -386,6 +386,10 @@ COMPILER_RT:remove:pn-webkitgtk:armeb = "-rtlib=compiler-rt"
 COMPILER_RT:pn-qtbase:toolchain-clang:riscv32 = "-rtlib=compiler-rt ${UNWINDLIB}"
 
 LDFLAGS:append:pn-qtwebengine:toolchain-clang:runtime-gnu:x86 = " -latomic"
+
+# | i686-yoe-linux-ld.lld: error: undefined symbol: __atomic_store
+LDFLAGS:append:pn-lttng-tools:toolchain-clang:x86 = " -latomic"
+
 LDFLAGS:append:pn-qemu:toolchain-clang:x86 = " -latomic"
 # warning: <elfFile> has a LOAD segment with RWX permissions
 LDFLAGS:append:pn-ruby:toolchain-clang:powerpc = "${@bb.utils.contains('DISTRO_FEATURES', 'ld-is-lld', '', ' -Wl,--no-warn-rwx-segment', d)}"