thirdparty/ykcore: link against libpthread

[Piraty]

keepassxc failed to link ykcore library due to missing -pthread flag.

Build Log

<...>
[382/549] Linking CXX executable src/keepassxc
FAILED: src/keepassxc 
: && /usr/lib/ccache/bin/g++ -DNDEBUG -fstack-clash-protection -D_FORTIFY_SOURCE=2 -mtune=generic -Og -ggdb3    -fdebug-prefix-map=/builddir/keepassxc-2.7.1=. -fno-common -Wall -Wextra -Wundef -Wpointer-arith -Wno-long-long -Wformat=2 -Wmissing-format-attribute -fvisibility=hidden -fvisibility-inlines-hidden -fstack-protector-strong -Wnon-virtual-dtor -Wold-style-cast -Woverloaded-virtual -Werror=format-security -Wcast-align -fsized-deallocation -Wno-deprecated-declarations -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -Wl,--no-add-needed -Wl,--as-needed -Wl,--no-undefined -Wl,-z,relro,-z,now -pie   -Wl,--export-dynamic -rdynamic  -fPIE -pie src/CMakeFiles/keepassxc.dir/keepassxc_autogen/mocs_compilation.cpp.o src/CMakeFiles/keepassxc.dir/main.cpp.o -o src/keepassxc  src/libkeepassx_core.a  src/libautotype.a  src/browser/libkeepassxcbrowser.a  src/qrcode/libqrcode.a  /usr/lib/libQt5Svg.so.5.15.2  /usr/lib/libqrencode.so  src/fdosecrets/libfdosecrets.a  /usr/lib/libQt5Concurrent.so.5.15.2  /usr/lib64/libpcsclite.so  src/libzxcvbn.a  /usr/lib/libargon2.so  src/thirdparty/ykcore/libykcore.a  /usr/lib/libusb-1.0.so  src/sshagent/libsshagent.a  /usr/lib/libQt5Network.so.5.15.2  src/keeshare/libkeeshare.a  /usr/lib/libQt5Widgets.so.5.15.2  /usr/lib/libbotan-2.so  /usr/lib/libz.so  /usr/lib/libminizip.so  /usr/lib/libQt5DBus.so.5.15.2  /usr/lib/libQt5X11Extras.so.5.15.2  /usr/lib/libQt5Gui.so.5.15.2  /usr/lib/libQt5Core.so.5.15.2  -lX11 && :
/usr/bin/ld: src/thirdparty/ykcore/libykcore.a(ykcore.c.o): undefined reference to symbol 'pthread_setspecific@@GLIBC_2.2.5'
/usr/bin/ld: /lib64/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
<...>

Testing strategy

Build for Void Linux

# consult https://github.com/void-linux/void-packages/tree/da6b404aa293c3df6de54a2c8827e010dab54f42#foreign 
git clone https://github.com/void-linux/void-packages/ && cd void-packages
# modify `srcpkgs/keepassxc/template` to build keepassxc-2.7.1
./xbps-src pkg keepassxc 

Type of change

• ✅ Bug fix (non-breaking change that fixes an issue)

[codecov-commenter]

Codecov Report

Merging #7807 (6abc55c) into develop (692c95b) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #7807      +/-   ##
===========================================
- Coverage    64.31%   64.29%   -0.03%     
===========================================
  Files          339      339              
  Lines        43430    43430              
===========================================
- Hits         27932    27919      -13     
- Misses       15498    15511      +13     

Impacted Files	Coverage Δ
...rc/fdosecrets/widgets/SettingsWidgetFdoSecrets.cpp	56.06% <0.00%> (-3.03%)	⬇️
src/fdosecrets/dbus/DBusMgr.cpp	52.20% <0.00%> (-1.47%)	⬇️
src/core/Entry.cpp	82.65% <0.00%> (-0.20%)	⬇️

---

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[phoerious]

Could you rebase your branch to the latest develop HEAD, please?

[Piraty]

rebased