Fix pkgbuild skipping static libraries and adds /usr/lib/janet for jpm.

pkgbuild-janet-lang.patch

diff --git a/PKGBUILD b/PKGBUILD
index 479ef5e..fc24851 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -12,6 +12,7 @@ provides=('janet')
 conflicts=('janet-lang-git')
 source=("$pkgname-$pkgver.tar.gz::https://github.com/janet-lang/janet/archive/v${pkgver}.tar.gz")
 sha256sums=('02724d6074a0d6fa53a548e8bdaaf49999f082e30b277c73444900f739a53062')
+options=('staticlibs')
 
 janet_build='JANET_BUILD=\"f7ee8bd\"'
 
@@ -39,4 +40,6 @@ package() {
     cp -a examples "${pkgdir}"/usr/share/janet
 
     install -Dm644 build/doc.html "${pkgdir}"/usr/share/doc/janet/doc.html
+
+    install -Dm644 -t "${pkgdir}"/usr/lib/janet tools/.keep
 }