update dev-lang/zig dependencies

dev-lang/zig/zig-9999-r1.ebuild

@@ -9,7 +9,8 @@ DESCRIPTION="A robust, optimal, and maintainable programming language"
 HOMEPAGE="https://ziglang.org/"
 LICENSE="MIT"
 SLOT="0"
-IUSE="+experimental"
+IUSE="+experimental test"
+RESTRICT="!test? ( test )"
 
 if [[ ${PV} == 9999 ]]; then
 	EGIT_REPO_URI="https://github.com/ziglang/zig.git"
@@ -19,6 +20,8 @@ else
 	KEYWORDS="~amd64"
 fi
 
+BUILD_DIR="${S}/build"
+
 # According to zig's author, zig builds that do not support all targets are not
 # supported by the upstream project.
 ALL_LLVM_TARGETS=(
@@ -28,7 +31,7 @@ ALL_LLVM_TARGETS=(
 ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
 LLVM_TARGET_USEDEPS="${ALL_LLVM_TARGETS[@]}"
 
-LLVM_MAX_SLOT=12
+LLVM_MAX_SLOT=13
 
 RDEPEND="
 	sys-devel/clang:${LLVM_MAX_SLOT}
@@ -49,3 +52,8 @@ src_configure() {
 	)
 	cmake_src_configure
 }
+
+src_test() {
+	cd "${BUILD_DIR}" || die
+	./zig build test || die
+}