gtkmm3: mostly enabling pie, lto

gtkmm3/.signature

@@ -1,5 +1,5 @@
 untrusted comment: verify with /etc/ports/contrib.pub
-RWSagIOpLGJF37VcJFmr4Jmwbq29OeAQ9mzdOmz59lq00r+PXIYnZCm0vRRNXxkZawKRKtTFoNRKz4DibYXO8uzXwXBelGSh7wc=
-SHA256 (Pkgfile) = 3e3846f668f568a4ceccb039eca9effd7e477961e8abc80e33a989a14f6a4371
+RWSagIOpLGJF32RS/oOgokD1NTTeOEh6JodkaGfmNJz7vrZLu/go/vV37QKsmIXNRBcvx3BOxJL7k9smfJwNkkcCftsL5FkdHgU=
+SHA256 (Pkgfile) = 0cac227f0f89512e49214c423c57f2148acab6121a38fb507008855adeaf7158
 SHA256 (.footprint) = ae7fc845af51e8408c8dccb34bf2d10498ccbbbb2bbb2cf816cd043c0797d7ba
 SHA256 (gtkmm-3.24.5.tar.xz) = 856333de86689f6a81c123f2db15d85db9addc438bc3574c36f15736aeae22e6

gtkmm3/Pkgfile

@@ -12,7 +12,12 @@ build() {
   meson setup gtkmm-$version build \
     --prefix=/usr \
     --sysconfdir=/etc \
-    --buildtype=plain
+    --buildtype=plain \
+    --wrap-mode nodownload \
+    -D b_lto=true \
+    -D b_pie=true \
+    -D build-demos=false \
+    -D build-tests=false
   meson compile -C build
   DESTDIR=$PKG meson install -C build
 }