[dev-libs/Ice] install arch-dependent ruby ext into sitearchdir, remove eutils since its probably uneeded now

dev-libs/Ice/Ice-3.6.9999.ebuild

@@ -20,7 +20,7 @@ EGIT_REPO_URI="https://github.com/zeroc-ice/ice.git"
 EGIT_CHECKOUT_DIR="${WORKDIR}/${PN}"
 EGIT_BRANCH="3.6"
 
-inherit db-use eutils mono-env php-ext-source-r3 python-r1 ruby-ng toolchain-funcs versionator git-r3
+inherit db-use mono-env php-ext-source-r3 python-r1 ruby-ng toolchain-funcs versionator git-r3
 
 # for mono-env
 unset SRC_URI
@@ -175,9 +175,10 @@ src_configure() {
 
 	if use ruby; then
 		SITERUBY="$(ruby23 -r rbconfig -e 'print RbConfig::CONFIG["sitelibdir"]')"
+		SITERUBYARCH="$(ruby23 -r rbconfig -e 'print RbConfig::CONFIG["sitearchdir"]')"
 		MAKE_RULES_RUBY=(
 			"install_rubydir=\"${ED%/}/${SITERUBY}\""
-			"install_libdir=\"${ED%/}/${SITERUBY}\""
+			"install_libdir=\"${ED%/}/${SITERUBYARCH}\""
 		)
 
 		# make it use ruby23 only