remove ldif60 from pkgconfig file

Closes: #732652
thunderbird.install.in: shipping all files in /u/l/i/components

/usr/lib/icedove/components needs some more files, so copying all files
inside the source directory

Closes: #737811
debian/rules: fix *.js file-permissions for iceowl-extension

Lintian is complaining about executable rights for some JS files inside
iceowl-extension.
http://lintian.debian.org/tags/executable-not-elf-or-script.html
debian/rules: remove -Wl,--as-needed linker option

The dynamic linker option for library bindings prevents needed bindings
to libraries and symbols that normaly not be used by Icedove itself.
With this some external programs can't reach symbols that are needed. So
the option 'LDFLAGS += -Wl,--as-needed' for should not be set and used!

Closes: #732652,#730450,#724688
rebuild patch queue from patch-queue branch

added patches:
porting-powerpcspe/FTBFS-Altivec-is-not-available-on-powerpcspe.patch

Closes: #734859
document changes and release 24.3.0-2
Merge remote-tracking branch 'origin/master'