Link some libraries dynamically on Linux.

Some libraries that should be on all target systems could be linked
dynamically, list taken from:

https://github.com/AppImage/pkg2appimage/blob/master/excludelist

This should fix some problems with fontconfig version mismatch.

external/ffmpeg/CMakeLists.txt

@@ -54,11 +54,14 @@ else()
             va-drm
             va
             vdpau
-            drm
             Xi
             Xext
             Xfixes
             Xrender
         )
+        target_link_libraries(external_ffmpeg
+        INTERFACE
+          drm
+        )
     endif()
 endif()

external/qt/CMakeLists.txt

@@ -213,12 +213,6 @@ else()
         endif()
         target_link_static_libraries(external_qt
         INTERFACE
-            SM
-            ICE
-            fontconfig
-            freetype
-            expat
-            z
             xcb-shm
             xcb-xfixes
             xcb-render
@@ -239,6 +233,12 @@ else()
         endif()
         target_link_libraries(external_qt
         INTERFACE
+            ICE
+            SM
+            fontconfig
+            freetype
+            expat
+            z
             xcb
             X11
             X11-xcb

external/zlib/CMakeLists.txt

@@ -63,5 +63,5 @@ elseif (APPLE AND NOT build_osx)
 elseif (APPLE)
     target_link_libraries(external_zlib INTERFACE /usr/local/lib/libz.a)
 else()
-    target_link_static_libraries(external_zlib INTERFACE z)
+    target_link_libraries(external_zlib INTERFACE z)
 endif()