NEX-5204 silence lint and studio warnings that only occur with an adjunct proto
Reviewed by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com>

*** 69,73 ****
--- 69,75 ----
  CERRWARN +=             -_gcc=-Wno-unused-value
  CERRWARN +=             -_gcc=-Wno-extra
  CERRWARN +=             -_gcc=-Wno-parentheses
  CERRWARN +=             -_gcc=-Wno-address
  CERRWARN +=             -_gcc=-Wno-unused-function
+ 
+ CERRWARN +=     -_cc=-errhdr=no%$(ADJUNCT_PROTO)/usr/include/glib-2.0