a7b3c03 Provide AM_COND_IF-combatible implementation for old automake systems

Authored and Committed by jhrozek 9 years ago
    Provide AM_COND_IF-combatible implementation for old automake systems
    
    AM_COND_IF is a very handy construct that is not present on old automake
    systems such as the one in RHEL5.
    
    The original author of the code is  Ralf Corsepius <rc040203 -at- freenet.de>
    
        
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