vigra: change PROVIDES and REQUIRES entries to lowercase.
vigra: change PROVIDES and REQUIRES entries to lowercase.

Minor fixes to vigra-config.

miqlas/haikuports,Begasus/haikuports,haikuports/haikuports,Begasus/haikuports,moochris/haikuports,Begasus/haikuports,Begasus/haikuports,nielx/haikuports,moochris/haikuports,koletzky/haikuports,haikuports/haikuports,Begasus/haikuports,nielx/haikuports,haikuports/haikuports,koletzky/haikuports,moochris/haikuports,nielx/haikuports,miqlas/haikuports,koletzky/haikuports,haikuports/haikuports,haikuports/haikuports,miqlas/haikuports