gbm: work around mesa linkage issue
Created by: fjhenigman
Mesa drivers such as i965_dri.so use symbols from libglapi but do not pull in libglapi (https://bugs.freedesktop.org/show_bug.cgi?id=57702) so dlopen libglapi before we need it.
Created by: fjhenigman
Mesa drivers such as i965_dri.so use symbols from libglapi but do not pull in libglapi (https://bugs.freedesktop.org/show_bug.cgi?id=57702) so dlopen libglapi before we need it.