fix malformed pkgconfig/glew.pc

--- glew-1.5.6.ebuild
+++ glew-1.5.6.ebuild
@@ -24,8 +24,6 @@
 
 pkg_setup() {
 	myglewopts=(
-		GLEW_DEST="${ED}/usr"
-		LIBDIR="${ED}/usr/$(get_libdir)"
 		AR="$(tc-getAR)"
 		STRIP="true"
 		CC="$(tc-getCC)"
@@ -51,7 +49,10 @@
 }
 
 src_install() {
-	emake "${myglewopts[@]}" install || die
+	emake \
+		GLEW_DEST="${ED}/usr" \
+		LIBDIR="${ED}/usr/$(get_libdir)" \
+		"${myglewopts[@]}" install || die
 	dodoc doc/*.txt README.txt TODO.txt || die
 	dohtml doc/*.{css,html,jpg,png} || die
 }