Add math library to pkg-config libs.private, not requires.private (#1408)
Add math library to pkg-config libs.private, not requires.private (#1408)

As intended and described (but mistyped) in a94f6deb1d2c60e12c6246c4562399c2e86f5a86
wxsBSD/yara,wxsBSD/yara,pombredanne/yara,wxsBSD/yara,VirusTotal/yara,pombredanne/yara,pombredanne/yara,VirusTotal/yara,cblichmann/yara,cblichmann/yara,hillu/yara,hillu/yara,VirusTotal/yara,hillu/yara,wxsBSD/yara,pombredanne/yara,hillu/yara,VirusTotal/yara,cblichmann/yara,cblichmann/yara,cblichmann/yara,wxsBSD/yara,VirusTotal/yara,hillu/yara,pombredanne/yara