opensaf: Add -latomic to LDFLAGS

* Add "-Wl,--as-needed -latomic -Wl,--no-as-needed"
  to LDFLAGS to let the libatomic handled automatically
  if required to fix below build error as atomic
  operations on some arch such as x86 are supplied by
  the compiler. For other arch which lacks the instructions,
  a standardized external call provided by external library
  libatomic will be made to perform the operation.

  | src/amf/amfd/bin_osafamfd-main.o: In function `std::__atomic_base<unsigned long long>::load(std::memory_order) const':
  | $Prj/build/tmp/work/ppc7400-wrs-linux/opensaf/5.2.0-r0/recipe-sysroot/usr/include/c++/6.3.0/bits/atomic_base.h:396: undefined reference to `__atomic_load_8'
  | $Prj/build/tmp/work/ppc7400-wrs-linux/opensaf/5.2.0-r0/recipe-sysroot/usr/include/c++/6.3.0/bits/atomic_base.h:396: undefined reference to `__atomic_load_8'
  | collect2: error: ld returned 1 exit status
  | make[2]: *** [Makefile:8200: bin/osafamfd] Error 1
  | make[2]: *** Waiting for unfinished jobs....
  | make[2]: Leaving directory '$Prj/build/tmp/work/ppc7400-wrs-linux/opensaf/5.2.0-r0/build'
  | make[1]: *** [Makefile:19749: all-recursive] Error 1
  | make[1]: Leaving directory '$Prj/build/tmp/work/ppc7400-wrs-linux/opensaf/5.2.0-r0/build'
  | make: *** [Makefile:6175: all] Error 2

 Reference: https://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary#line-23

Signed-off-by: Mingli Yu <Mingli.Yu@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-networking/recipes-daemons/opensaf/opensaf_5.2.0.bb

@@ -43,6 +43,8 @@ PACKAGECONFIG_append = "${@bb.utils.contains('DISTRO_FEATURES', 'systemd', ' sys
 
 PKGLIBDIR="${libdir}"
 
+LDFLAGS += "-Wl,--as-needed -latomic -Wl,--no-as-needed"
+
 do_install_append() {
     cp -av --no-preserve=ownership ${B}/lib/.libs/*.so* ${D}${libdir}
     rm -fr "${D}${localstatedir}/lock"