libs/libgd: Update to 2.2.4

Update libgd to 2.2.4
Fixes multiple CVEs
Refresh patches
Update list according to:
https://svnweb.freebsd.org/ports/head/graphics/gd/pkg-plist?revision=432648&view=markup
...except helpers as it's not generated.

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

libs/libgd/patches/102-gdlib-pc-in.patch

@@ -0,0 +1,9 @@
+--- a/config/gdlib.pc.in
++++ b/config/gdlib.pc.in
+@@ -7,5 +7,5 @@ Name: gd
+ Description: GD graphics library
+ Version: @VERSION@
+ Cflags: -I${includedir}
+-Libs.private: @LIBS@ @LIBICONV@
++Libs.private: @LIBS@ 
+ Libs: -L${libdir} -lgd