build: link against tss2-mu

[diabonas]

Currently the linking of libtpm2-totp relies on the fact that the upstream tpm2-tss pkg-config file explicitly requires tss2-mu. Since this is wrong and will be changed upstream, but we need access to the marshalling functions, explicitly link against tss2-mu. See https://github.com/tpm2-software/tpm2-tss/pull/1417 for a more detailed discussion.

[codecov[bot]]

Codecov Report

Merging #31 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #31   +/-   ##
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  Coverage   80.46%   80.46%           
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  Files           5        5           
  Lines         819      819           
=======================================
  Hits          659      659           
  Misses        160      160

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[dilyanpalauzov]

$(TSS2_MU_CFLAGS) is always used together with $(TSS2_ESYS_CFLAGS) and $(TSS2_ESYS_LIBS) is always used together with $(TSS2_MU_LIBS).

One can replace both calls to PKG_CHECK_MODULES([TSS2_ESYS],[tss2-esys]) and PKG_CHECK_MODULES([TSS2_MU],[tss2-mu]) with a single PKG_CHECK_MODULES([TSS2_X],[tss2-esys tss2-mu]) and then use $(TSS2_X_CFLAGS) instead of $(TSS2_MU_CFLAGS) $(TSS2_ESYS_CFLAGS) and $(TSS2_X_LIBS) instead of $(TSS2_ESYS_LIBS) $(TSS2_MU_LIBS).