Bug#650151: Fixes to iceweasel to build on Alpha

[Michael Cree]

The fixes to iceweasel to build on alpha listed in this bug report are no
longer relevant due to a much newer iceweasel in unstable.  I list here
fixes required to get iceweasel 24.2.0esr-1 to build on Alpha.

The patches attached are:

update-debian-rules-for-alpha.patch:   Don't use -Wl,--no-keep-memory in
LDFLAGS to avoid crash in linker (I have filed a bug in binutils upstream
regarding that).  Build with -O1 which fixes a crash that looks just like
bug #717416 reported for sparc but unfortunately the fix for sparc does not
work for alpha.

alpha-use-mmap-syscalls.diff:  The six argument bug in syscall() on alpha
is now fixed so the special alpha code can be removed.

alpha-hardcode-pagesize.diff:  Page size on alpha is 8k.

add-libc6-1-to-libc-candidates.patch:  The version of libc is hardcoded in
one of the js modules, but Alpha uses libc6.1.  Add that to the list of
versions.

Cheers
Michael.
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