util/disk_cache: scale cache according to filesystem size
util/disk_cache: scale cache according to filesystem size

Select higher of current 1G default or 10% of filesystem where
cache is located.

Acked-by: Timothy Arceri <c48760dafc316d20cf5b0817150c999e82cd892f@itsqueeze.com>
Reviewed-by: Grazvydas Ignotas <eac34e836c3bc120048c86fead6dd0257a872a9e@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler