Update vec3-spec.js
Update vec3-spec.js

Unit test for vec3.rotateX() vec3.rotateY() & vec3.rotateZ()
verma/gl-matrix,Drakesinger/gl-matrix,sajjadt/gl-matrix,WoodMath/gl-matrix,Drakesinger/gl-matrix,3D4Medical/gl-matrix,kyroskoh/gl-matrix,toji/gl-matrix,kyroskoh/gl-matrix,kyroskoh/gl-matrix,nickdesaulniers/gl-matrix,verma/gl-matrix,3D4Medical/gl-matrix,nickdesaulniers/gl-matrix,kkuunnddaannkk/gl-matrix,verma/gl-matrix,WoodMath/gl-matrix,sajjadt/gl-matrix,3D4Medical/gl-matrix,toji/gl-matrix,kkuunnddaannkk/gl-matrix