cmake-native: Remove help docs from the native sysroot

This drops the file count for cmake-native from ~3000 to ~1700
which is a decent chunk of files not to be copying to each native
sysroot for no reason.

(From OE-Core rev: 6e561619a2a2b688735deae968eb66027fd4b9f0)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/cmake/cmake-native_3.22.2.bb

@@ -46,6 +46,9 @@ do_install() {
 	install -m 644 ${WORKDIR}/OEToolchainConfig.cmake ${D}${datadir}/cmake/
 	mkdir -p ${D}${base_prefix}/environment-setup.d
 	install -m 644 ${WORKDIR}/environment.d-cmake.sh ${D}${base_prefix}/environment-setup.d/cmake.sh
+
+	# Help docs create tons of files in the native sysroot and aren't needed there
+	rm -rf ${D}${datadir}/cmake-*/Help
 }
 
 do_compile[progress] = "percent"