glsl: Handle failure of Python codegen scripts.
authorMatt Turner <mattst88@gmail.com>
Mon, 11 Jan 2016 18:54:19 +0000 (10:54 -0800)
committerMatt Turner <mattst88@gmail.com>
Wed, 13 Jan 2016 18:35:12 +0000 (10:35 -0800)
commit966a0dd72066cc98e0df9a02028ee0d85d466e26
treec28bf97e7098abb8d9a08a9736a974f39416323e
parent84d6130c21a8a570efefe54aa723f549b34c3256
glsl: Handle failure of Python codegen scripts.

If a Python codegen script failed, it would write a zero-byte file,
which on subsequent invocations of make would trick it into thinking the
file was appropriately generated.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
src/glsl/Makefile.am