Bug 18831: Use own Yasm for Firefox cross-compilation

Starting with Firefox ESR52 Yasm < 1.2.0 is not sufficient anymore to
compile our browser part for Windows. Ubuntu Precise still ships with
such a version, though. We compile our own version until we get off of
Precise.

tor-browser-bundle.git commit: 910094fc33ae4e75e10fee754bec106e83e0eac5

projects/firefox/build

@@ -11,6 +11,10 @@
   # compiler setup so that mingw is first in the PATH.
   export LD_LIBRARY_PATH=$hgccdir/lib64
   export PATH=$hgccdir/bin:$PATH
+
+  # Firefox ESR52 needs Yasm >= 1.2.0 which Ubuntu Precise does not ship.
+  tar -C /var/tmp/dist -xf $rootdir/[% c('input_files_by_name/yasm') %]
+  export PATH="/var/tmp/dist/yasm/bin:$PATH"
 [% END -%]
 [% pc(c('var/compiler'), 'var/setup', { compiler_tarfile => c('input_files_by_name/' _ c('var/compiler')) }) %]
 distdir=/var/tmp/dist/[% project %]

projects/firefox/config

@@ -92,3 +92,6 @@ input_files:
   - project: gcc
     name: gcc
     enable: '[% c("var/windows") %]'
+  - project: yasm
+    name: yasm
+    enable: '[% c("var/windows") %]'

projects/yasm/build

+#!/bin/bash
+[% c("var/set_default_env") -%]
+distdir=/var/tmp/dist/[% project %]
+mkdir -p /var/tmp/build
+tar -C /var/tmp/build -xf $rootdir/[% c('input_files_by_name/yasm') %]
+cd /var/tmp/build/yasm-[% c("version") %]
+./configure --prefix="$distdir"
+make -j4
+make install
+cd /var/tmp/dist
+[% c('tar', {
+        tar_src => [ project ],
+        tar_args => '-czf ' _ dest_dir _ '/' _ c('filename'),
+    }) %]

projects/yasm/config

+# vim: filetype=yaml sw=2
+version: 1.2.0
+filename: '[% project %]-[% c("version") %]-[% c("var/build_id") %].tar.gz'
+remote_docker: 1
+
+input_files:
+  - project: docker-image
+  - URL: 'https://www.tortall.net/projects/yasm/releases/yasm-[% c("version") %].tar.gz'
+    name: yasm
+    sha256sum: 768ffab457b90a20a6d895c39749adb547c1b7cb5c108e84b151a838a23ccf31