build.sh: remove CACHE env variable as it is not implementable
build.sh: remove CACHE env variable as it is not implementable

The concept of global cache for multiple modules does not exist.

When using --cache-file with the same path, variables with the same
name have their values overwritten on a "last write wins" principle.

For example, this cached variable from clock:
pkg_cv_XFT_LIBS=${pkg_cv_XFT_LIBS='-L/home/nadon/xorg/src/lib -lXft  '}

is overwritten with the value from xdm:
pkg_cv_XFT_LIBS=${pkg_cv_XFT_LIBS='
-L/home/nadon/xorg/src/lib -lXrender -lX11 -lXft  '}

If there is some limited usefulness in specific scanerios, one
can pass the --cache-file option in CONFFLAGS.

This was introduced in commit e5592f548a03e332f2b52f6bd502c4593f7816b3
to improve performance.

Acked-by: Trevor Woerner <8835777cd84fba3d7873eabbbe1f2de2d3f25b00@gmail.com>
Signed-off-by: Gaetan Nadon <8a8cc541338200f67d4d0bcb65c78b6166649462@videotron.ca>

freedesktop-unofficial-mirror/xorg__util__modular,freedesktop-unofficial-mirror/xorg__util__modular,freedesktop-unofficial-mirror/xorg__util__modular