android,autotools,i965: Fix location of float64_glsl.h
Android.mk and autotools disagree about where generated files should go, which wasn't a problem until we wanted to build a dist tarball. This corrects the problme by changing the output and include paths to be the same on android and autotools (meson already has the correct include path).
Fixes: 7d7b3083 ("automake: Fix path to generated source")