[1.12] build: Don't assume we can set permissions on a directory

build: Don't assume we can set permissions on a directory

MSYS2 has enough of a Unixish environment to run Autotools, but apparently not enough of a Unixish environment to have functional permissions.

Closes #216 (closed)

See merge request !110 (merged)

(cherry picked from commit 6ee63e3a)

14f46d14 build: Don't assume we can set permissions on a directory