cmake: Fix build against pcsc-lite >= 2.2 #411
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The pcsc-lite 2.2.0 switched from autotools to meson and reworked the pkgconfig files. The new pkg config provides CFLAGS that work ok, but the yubihsm-shell ignores them and hopes that all included files are in the default include directory (with the PCSC prefix).
Note, the value ${LIBPCSC_CFLAGS} is not in quotes because it is a semicolon separated list which we need to split to separate items here.
This solution works with both old and new versions.
Fixes: #404