[Buildroot] [git commit branch/next] package/wireshark: link with -latomic if needed

commit: https://git.buildroot.net/buildroot/commit/?id=0344be5299259c9f3e2e928b51af6868948e78bc
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/next

Fix the following build failure raised since bump to version 3.4.7 in
commit bb75c4b541fac144b53b63248e235f22ba1d25ad:

/tmp/instance-5/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/9.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: ui/qt/CMakeFiles/qtui.dir/sequence_diagram.cpp.o: undefined reference to symbol '__atomic_compare_exchange_4@@LIBATOMIC_1.0'
/tmp/instance-5/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/9.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: /tmp/instance-5/output-1/host/sparc-buildroot-linux-uclibc/sysroot/lib/libatomic.so.1: error adding symbols: DSO missing from command line

Fixes:
 - http://autobuild.buildroot.org/results/6617ee0e0046a0452a1515b89e9c704b1c125ec4

Signed-off-by: Fabrice Fontaine <redacted>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <redacted>
---
 package/wireshark/wireshark.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/package/wireshark/wireshark.mk b/package/wireshark/wireshark.mk
index e852083de6..6ee4b20391 100644
--- a/package/wireshark/wireshark.mk
+++ b/package/wireshark/wireshark.mk

@@ -43,6 +43,10 @@ endef
 
 WIRESHARK_PRE_BUILD_HOOKS += WIRESHARK_BUILD_LEMON_TOOL
 
+ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
+WIRESHARK_CONF_OPTS += -DCMAKE_EXE_LINKER_FLAGS=-latomic
+endif
+
 ifeq ($(BR2_GCC_ENABLE_LTO),y)
 WIRESHARK_CONF_OPTS += -DENABLE_LTO=ON
 else

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