linux/random.h: present but cannot be compiled

[trishankatdatadog]

When compiling Python >= 3.5.3 and >= 3.6.0, we see the following warning:

+ ./configure --prefix=/opt/_internal/cpython-3.5.3 --disable-shared
configure: WARNING: linux/random.h: present but cannot be compiled
configure: WARNING: linux/random.h:     check for missing prerequisite headers?
configure: WARNING: linux/random.h: see the Autoconf documentation
configure: WARNING: linux/random.h:     section "Present But Cannot Be Compiled"
configure: WARNING: linux/random.h: proceeding with the compiler's result
configure: WARNING:     ## --------------------------------------- ##
configure: WARNING:     ## Report this to https://bugs.python.org/ ##
configure: WARNING:     ## --------------------------------------- ##

This issue seems to have been around for a little while, at least.

Don't know yet what impact it has on built wheels.