Build fixes for cherry-picking to maint-5.20?

The following build/test fixes, mostly for Android, look good for
maint-5.20 to me. Any seconders and thirders?

329865d Makefile.SH: Fix cross builds with -Uhostgenerate
ef4ead6 Makefile.SH: Add missing files for make test on cross builds
22636a2 t/op/taint.t: Accommodate for systems without an inbuilt echo
(android, blackberry)
a872f74 Configure: Discard errors when testing for less -R
ecd78e2 Configure: Handle hyphens when searching cpp symbols
47ef2f8 Simplify cppsym dash problem

• Build fixes for cherry-picking to maint-5.20? by Steve Hay
• Re: Build fixes for cherry-picking to maint-5.20? by Karl Williamson
• Re: Build fixes for cherry-picking to maint-5.20? by Brian Fraser
• Re: Build fixes for cherry-picking to maint-5.20? by Steve Hay
• Re: Build fixes for cherry-picking to maint-5.20? by Brian Fraser
• Re: Build fixes for cherry-picking to maint-5.20? by Brian Fraser
• Re: Build fixes for cherry-picking to maint-5.20? by Steve Hay
• Re: Build fixes for cherry-picking to maint-5.20? by H.Merijn Brand