SampleApp builds skia on Linux with BGRA pixel order, but Ganesh's SampleApp

assumes GL_RGBA texture format on all platforms except Windows (where it uses
GL_BGRA), so texture colours come out wrong.  As a temporary fix, do on Linux
what we do on Windows, and assume GL_BGRA.  (This should be made more general
later, and the assumption of matching formats between Skia and Ganesh removed.)

Review URL:  http://codereview.appspot.com/4474046/



git-svn-id: http://skia.googlecode.com/svn/trunk@1247 2bbb7eff-a529-9590-31e7-b0007b416f81

gpu/include/GrGLConfig.h

@@ -133,7 +133,7 @@
 // Pick a pixel config for 32bit bitmaps. Our default is GL_RGBA (except on
 // Windows where we match GDI's order).
 #ifndef GR_GL_32BPP_COLOR_FORMAT
-    #if GR_WIN32_BUILD
+    #if GR_WIN32_BUILD || GR_LINUX_BUILD
         #define GR_GL_32BPP_COLOR_FORMAT    GR_GL_BGRA
     #else
         #define GR_GL_32BPP_COLOR_FORMAT    GR_GL_RGBA