example: fix how to compile C example
example: fix how to compile C example

QUSpilPrgm/glad,bsmr-opengl/glad,dbralir/glad,aaronmjacobs/glad,QUSpilPrgm/glad,aaronmjacobs/glad,QUSpilPrgm/glad,aaronmjacobs/glad,dbralir/glad,QUSpilPrgm/glad,hrehfeld/glad,valeriog-crytek/glad,0x1100/glad,dbralir/glad,valeriog-crytek/glad,0x1100/glad,valeriog-crytek/glad,hrehfeld/glad,0x1100/glad,valeriog-crytek/glad,bsmr-opengl/glad,aaronmjacobs/glad,0x1100/glad,bsmr-opengl/glad,hrehfeld/glad,dbralir/glad,bsmr-opengl/glad,hrehfeld/glad