fix a typo in EGL loader

the code intended to filter out the software-renderer, but the
test as written was essentially a no-op.

the problem didn't happen most of the time because we had
updated egl.cfg to not even list the software renderer.

the test as written didn't generate a compile-time error
because String8 has a const char* cast operator; but the
end result was to compare pointers instead of the string
itself.

http://code.google.com/p/android/issues/detail?id=54606

Change-Id: I739dd1c838fbc24c5643a631fae19713a8ef1717

opengl/libs/EGL/Loader.cpp

@@ -161,7 +161,7 @@ Loader::Loader()
             if (sscanf(line, "%u %u %s", &dpy, &impl, tag) == 3) {
                 //ALOGD(">>> %u %u %s", dpy, impl, tag);
                 // We only load the h/w accelerated implementation
-                if (tag != String8("android")) {
+                if (String8("android") != tag) {
                     mDriverTag = tag;
                 }
             }