dev-R/RInside: delete static library

Closes: https://bugs.gentoo.org/791883
Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

dev-R/RInside/RInside-0.2.16.ebuild

@@ -22,3 +22,8 @@ src_prepare() {
 	tc-export AR
 	R-packages_src_prepare
 }
+
+src_install() {
+	R-packages_src_install
+	find "${D}" -name "*.a" -delete || die
+}