[gles/cogl-shader] Add a missing semicolon
[gles/cogl-shader] Add a missing semicolon

cogl_shader_get_info_log was missing a semicolon which broke the build
on GLES 2.

Distrotech/cogl,gcampax/cogl,spatulasnout/cogl,collects/cogl,djdeath/cogl-android,spatulasnout/cogl,gcampax/cogl,djdeath/cogl,gcampax/cogl,collects/cogl,djdeath/cogl-android,djdeath/cogl,djdeath/cogl-android,Distrotech/cogl,Distrotech/cogl,djdeath/cogl,gcampax/cogl,Distrotech/cogl